i think that threads should be locked if people stop replying on them for like a week or something, cuz its annoying when people bring up months old threads from like page 30 of the social lounge.
one other thing. i think i read somewhere on here that no one can actually "delete" users, but i'm not sure. if you can, i think a user should be deleted or at least warned if their average posts per day drops below a certain number, of if they are inactive for a certain amount of time. that way, CF might be a little cleaner and uncluttered.
just some random ideas i thought of.