Anti-Spam plugin?

Hi there,
I noticed that there are more and more bots (I think they are not human) these days registering on this board and spamming the forum with pointless content. There are dozens of anti-bot/-spam plugins for MyBB (the forum software), preventing them from registering here. Isn't it an easier way to use some of that possibilities instead of deleting them (I think manually)? Or is there already something you're using?

~SunRed

Theres a captcha when registering an account and new accounts ip/email adresses are also checked against the stopforumspam.com database. There were like 20 spambots or more per day before i added that. It worked fine, but now in the past couple months there have been more and more spambots that got trough :/

Ill see if there are any more or new methods of stopping them.