why do people cover their user names

[td212]

and a buncha other stuff in their ratio proofs

[The Gladiator]

Probably because they don't want to get banned on that sites...

[YoYoY]

and other people can user their usernames to steel accounts , I know someone who had that problem before and most of his account were gone because of knowing his username
also some people use it as a cover to hide their real username to do something naughty

[lostdemon]

td212 you just graduated username covering 101

Now you know and knowing is half the battle. Yo Joe

[fOrUmAs]

for security reasones of course

but no one force u to do that anyway

[soulreaper]

Picture a scenario where you've got the same username here as well as bmtv(assume).You abuse their staff out of sheer frustration or say something controversial that they deem to be abusive(they tend to deem most things as abusive),then you may get banned.
Go ahead,ponder.

[The Flying Cow]

People don't need to know your usernames on private trackers. For authorities, this is only more clues as to your suspicious activities on the intra-net.

[Adama]

for security reasones
protection is better than the cure

[ghurka]

Only those who have something to hide need to cover their usernames. You will find that the more trustworthy people within the BT community keep to the same username on every tracker and forum.

[mrnobody]

cover my nick with your finger