For an example, I was on a larger, very well moderated forum last night and I saw at least 4 or 5 spam threads. Making it harder to sign up will only slow the spammers down for a bit, but what happens when they figure out how to circumvent the new controls? More spam controls are like more gun laws, it just makes it harder for those that are doing nothing wrong while the bad guys are doing business as usual. We just need to diligently take care of the spam that gets through. Personally, I think we do a pretty good job at it for the amount of mods we have.