I just restored signatures. So if you already had a signature, it should be restored now exactly the way it was before.
Seems like I found a better way to fight the spammer! I've been looking for a way to stop them from putting links and signatures in their profiles based on post count, and I think I've found a clever little way.
I took the user group "fresh meat," which is people who've made less than 10 posts, and I made it so that they can no longer view or edit their profiles! This means they can't worm *any* links into them whatsoever, until they make at least 10 forum posts.
Of course, this won't stop spammers from actually posting links in the forums, as strangely there seems to be no permissions based way to stop people from posting links. But at least those are easy to spot and delete. The main thing is that I want to take away their reason from registering dozens of accounts per day. I don't know if that will actually stop them from doing it, but at least now they won't get anything out of it.