I don't understand how you take away signature, avatar, etc. but you allow leechers to continue downloading files without helping out and thus continue leeching you need to make it so the leechers group cant download files, and only roughly 1/10 of leechers will leave feedback something like "Good Job!" +rep if i could (no rep power allows them to be even more lazy and not give people well deserved rep)
So, here's what im getting at...
REMOVE DOWNLOAD PRIVILEGES FROM LEECHERS
Further discussion appreciated