we actually created an 'anger management / vent' forum, where users could post about stuff that was ticking them off.

we had to make the rules clear, that they couldn't go in there to say 'member x sucks bug time!', but they could just go in there and let it rip about something that was pissing them off.

it helped in a coupla ways.

1. the user let off some steam
2. it made for some vERy interesting reading, to say the least!
3. there were some very well done 'Dennis Milleresque' rants, that we ended up saving for posterity.

2c