Sorry if this has been brought up already
On other forums I go to they Have a Reputation System, Its Pretty Neat and a Cool way to spot out douche bags and Spammers.
How it works, For example Someone posts a nice Movie and gets repped for it(his bar turns green and can rep other members higher/or neg)
or if someone spams topics/ or makes a topic about the same thing over and over then other forum members can Neg him, also that way mods/admins can see who needs to be banned or muted
just a suggestion h34r: