Signature campaigns was introduce so that there is a way to advertise crypto currencies, it's market and it's purpose, so if campaigns will be prohibited what would be the use of this forum? after all the reason why investors get the chance to choose a good project is thru various promotion like signature and bounty campaigns. We cannot help but accept the fact that we cannot eliminate shit poster, the best thing we can do is imposed other regulations like the merit system so that people will be obliged to work hard on their post quality.