Out of all the trackers I'm a member at BTmusic has the strictest rules I have even seen. You can't seed more than one torrent, can't download more than 4 torrents at a time, no poweruser class to go up to without donations, can not upload without permission...
i've been getting this: "Are you sure, that you really want to download that torrent?!? Please finish downloading earlier torrents first "
for the last hour with only one download going... sad