Signup abuse detection and blocking 1.16.11

Used to be absolutely overrun by spam bots, even though I don't run a "real" forum. Tried pretty much every CAPTCHA and it felt like barely a speed bump. This addon catches the majority of them, to the point where I rarely have to even delete any spam at all. 100% recommended.

Xon has some of the most useful addons and this is one of them. He also has unrivaled support. Literally fixing bugs within a day.

I've used this for over a year on a large forum with over 20 million posts. It's been working with no problems. We get a LOT of spam signups and this is pretty helpful to get rid of them. Configuration is complicated, and it does reject some users who I later choose to accept, but it works.