This is a good topic for discussion, and base on my knowledge about how signature campaign works her on this forum, I think spam regulation is a work which ought to be done by the campaign manager, and not the campaign itself. Hence, if a campaign is noticed to have much spammers than quality posters, then the manager is ought to be blame, and not the campaign itself, because the aim/objectives of signature campaigns is to get exposure, whereas that of signature managers is to operate according to the forum standard of spam elimination. Hence, if a signature campaign is noticed to have lots of spammers, then the campaign manager is to be blame and warned.