[Implement a reputation/thanks system (different than trust) with rewards for high ranking members
No.
The idea of a rep system still I don't think is a bad idea. If a spammer with negetive rep tries to join a campaign, they would be denied the privilege of joining the campaign. I do like the idea of campaign managers doing their jobs and delisting users who spam. The staff would be able to quickly identify the spammers. In addition. most ofther forums have a thanks/like button. Everyone can determine the credibility of the poster.