Really? Think about this: If all signature campaigns were banned, would you still stay active on this forum? I know 90% of the people currently in signature campaigns will not. :-/
But hey, I guess that's that for our current generation here on bitcointalk
Why sure. I've always been active making at least 14 posts a week before joining a signature campaign. The reason that I'm very active in BCT is because I'm a huge Bitcoin fan. Ever since I got into Bitcoin, I've got fascinated by its decentralized nature. So, even if all campaigns were banned I would still contribute to this forum.
Me too - I've been on Bitcointalk since 2010, and only signed up to a sig campaign a few weeks back. Having said that, I suspect you and I are very much the minority - and for that reason I'd be hesitant to ban sig campaigns. They seem to attract people to the forum, and through that people are learning about Bitcoin. I don't know whether mass adoption is possible (or necessary for Bitcoin's future success), but I do believe that more people learning about (and using!) BTC is a positive thing, despite the "endless September" vibe that the sig campaigns seem to have generated!