Rewards for being active on Forums

There should be a system where for every 5, 10, 15, and 20 forum posts you would get a certain reward. It would encourage new ideas and new forum members, and over all help improve the server and the server's community.
You would however, get a spam filter, so members can just spam posts to get the rewards quicker.

 

i dont really agree just because people could post random stuff and get a reward thumbs down for me!