Most of the members who replied in this thread are wearing signature, so it's expected that they will not favor on limiting signature campaign .
Even when I was a low rank member, I already participated in signature and honestly that makes me active in this forum.
Although, it would be a shame to ban something which in itself is fine, and the only reason its become a problem is because users are abusing it. However, if it were to get limited/banned then I probably wouldn't have an argument, because of the issues its currently causing the forum. There would be a whole load of users who would feel hard done by due to it being a minority, but maybe we should be looking at the campaign managers who are managing the participants.