Forums needs a upvote/downvote system so it’s easier for players to see who consistently gives unpopular opinions.
Each upvote gives + 1 to karma, while each downvote gives -1 to karma.
Karma is publicly displayed for anyone to see, and either appears on your profile or beside each comment/topic you make.
Besides displaying how often people agree/disagree with your posts, karma has no real impact on forums discussions.
Edit: Karma could also be reduced by ISD/GM’s, if they feel people are being disruptive or breaking forums rules. Threads would still be closed, but people who fight purposefully in threads they dislike to try to lock it would feel an impact on their karma.