Let's try this out and see how it goes. If it doesn't work, we can easily get rid of it.
Basically, now in each user's profile there is a reputation level. Whenever you see someone post a great, benificial post.. click the Rep icon on the bottom left part of their post, and rate them up. If they submit a negative or malicious post, rate their reputation down. In the future there will be benifits to having a higher reputation.
This will hopefully encourage positive posts that add content to the forums.
Let me hear your feedback on this.