I got this list from here - http://www.vortex-webdesign.com/help/dontdoit.htm
I learnt something from this, its great logic - i found it when looking for ways to prevent right clik......
yet i question a few items mentioned (see bottom)
Frames, in theory, are pure genius. In practice, however, they are frequently pure disaster.
Frames are commonly implemented in an attempt to simplify site navigation by keeping links in a handy, always accessible frame. This is almost always better accomplished by organizing information in a logical hierarchy and creating pages with simple, intuitive navigation.
Another common use (misuse!) of frames is to align images so that they connect seamlessly in a layout. In nearly every instance, this is the wrong approach. The use of carefully aligned images to create a layout is somewhat questionable in the first place (I would know!), but if it must be done it is far more reliable to use tables. Show me a site that uses frames to achieve a layout, and I'll show you a site that falls to pieces in many browsing environments.
Although support for frames on the web has improved in the last couple of years, the fundamental problems they create for users still exist. The difficulties with bookmarking, e-mailing a link to page within a frameset and search engine indexing should be given serious consideration before a frameset is used. Add to these the fact that many of the newest browsers allow the user to turn off frames support, and the fairly recent advent of hand-held devices that are used to access the web, the circumstances under which frames are actually a desirable option become rare indeed.
2) Scrolling Marquees
One of the most widely reviled features that can be implemented on a page is the scrolling marquee. This "stupid web trick" accomplishes absolutely nothing other than to provide a distraction and to make it difficult for the user to read the information contained within.
The scrolling marquee is generally employed by newbies who think it's "neat". Use of the scrolling marquee is sure to impress anyone who has less than one week of experience with the web. The other 99% of users will appreciate the fact that the designer has identified him/herself as clueless and will leave the site with great haste, never to return, except possibly for a laugh.
3) Anything that blinks
Another "stupid web trick". The rule-of-thumb here is that just because you can do it, that doesn't mean you should. When people visit a site, their purpose is to read the information presented. Whether it be for research, entertainment or otherwise, the addition of blinking text or animations does nothing except distract the user and make it difficult for them to access your information. Many users will register their annoyance by avoiding your site at all costs.
There are exceptions to this rule. If the blink is subtle enough, it can be used to draw the visitor's attention without distracting them as they try to read. This can be achieved through the use of an animated gif. Use of the <blink> tag is to be avoided at all costs.
4) The dreaded Lake Applet
The Lake Applet was an interesting curiosity a few years ago. Visitors to sites using the applet were suitably impressed the first time they saw it. The second time they saw it, it was boring. The third time they saw it, it was mildly annoying. Further encounters with the Lake Applet resulted in uncontrollable fits of rage as they waited (and waited, and waited) for the cursed thing to load.
At the time of this writing, the Lake Applet is largely regarded as pointless, hack, overused, trite and an enormous waste of time and bandwidth. This applies to other water-related applets as well. Indeed, it applies to the use of applets in general, since Java has not kept it's promise of becoming an accepted standard.
5) Animated Cursors
Most computers allow the user to select the cursor they wish to use. People choose a cursor they like and works well for them. Many people do not appreciate it when a web site hijacks their chosen cursor setting and overrides it for no good reason other than that the author of the site thinks their cursor is better. (Reiterating the rule-of-thumb: if you add a feature to a page whose sole function is to be "neat" or "cool", you may rest assured that it is neither of those things).
6) Spawning new windows
Opening new windows on the user's computer has its place and can be done effectively. Effectively means that the link that spawns a new window is clearly labeled as one that does so. Links that spawn new windows but don't provide such a warning are considered to be rude. The unexpected opening of a new window frequently results in the immediate closing of the new window, usually before any content even has a chance to load in it. This sequence of actions is normally followed by the user quickly leaving the site that saw fit to launch a "surprise" window, never to return.
7) Anything that "pops up" without warning
8) Removing or restricting the users' controls
9) Hijacking the status bar
Displaying messages in the status bar of the visitor's browser is not only rude, it is also unnecessary and even somewhat suspicious. If you have a message you would like the user to read, put it on the page. The function of the status bar is to display the URLs of the hyperlinks on a page. Interrupting this function may arouse suspicion in the user in that they may wonder why the site is trying to hide that information from them.
This trick is commonly used by adult sites and pay-per-click sites to fool the visitor into going somewhere they did not want to go. Experienced surfers know this and they will not click a link whose address is not displayed in the status bar.
10) Disabling right-click
This is quite possibly the single most clueless feature an author can add to a page. It is usually done under the misapprehension that it will prevent the user from viewing source code or saving images from a page. Not only does disabling right-click achieve neither of those things, it actually encourages them. Circumventing this attempt at security usually takes about two seconds or less, using one of the following methods:
In the case of 'protecting' graphics, the right mouse button is not needed to save them, so disabling it serves no purpose at all:
In addition to being completely worthless as a means of security, disabling right-click also makes it impossible for many people to use your site at all. Some browsers use the right mouse button as a means of accessing your information. Without it, your page may be rendered completely inaccessable to many users. Left handed people sometimes reverse the function of their mouse buttons so that the right button is used to click links. On a page where the author has attempted to interfere with right clicks, those users will not be able to navigate.
The right mouse button has a number of other functions besides 'view source' and 'save as'. The author who knows what those functions are would never consider trying to disable it. The author who doesn't understand the importance of those functions probably shouldn't be trying to disrupt them.
There is one very useful feature of disabling right-click on a site, however. It provides a quick and easy way for the visitor to identify the creator of a site as a person of severely diminished mental capacity.
See also: Ten more things to avoid
1:Frames: i havent started using them yet but even Adobe uses them if you look on Help in Adobe Photoshop - it doesnt bother me at all-but i heard from others here that it should be avoided
6 & 7 "Spawning new windows & Pops up without warning"
i disagree with this in "some" cases because if you have links on your site - and the viewer cliks it - itll Normally override your site and the viewer has to go back see your site-by that time its already too late.
Most Flash sites create a New (popup)Windows to show the movie etc.and there are never any controls.
As in my sig site - having a new window pop up it ensures the viewers dont loose your Page...(which is gooooooood). to some extent i find it even more proffesional...(noob thought?) btw: do popup stoppers prevent the opening of new window after a clik of a link?
8. restricting the users' controls
as with 6&7 above - if showing a movie or a page which should be shown with purity only, removing controls/statusbar etc can in some cases only make the page/movie/piece more perfect (ie images etc) ?
i dont know what is-so i guess thats good
For the rest i totally agree - most commercial sites should read this list.
The p0rn industry regards this list as.... things you Must do....