Signature campaigns have contributed a lot in making bitcoin mainstream and in growing bitcoin community.Campaigns have also helped many bitcoin related business to establish.
That's BS. It has only ruined this forum by encouraging junk posting and keeping year-long pointless threads alive with banal content.
The solution is just to turn off forum signatures completely. They add nothing.
I created a thread with discussion of why disabling signatures is the only solution, and of course after a few pages and months even that thread was just signature spammers rehashing junk posts at each other.
By inaction, Theymos has made this forum not worth the time.