The Ban Hammer
Hi. Yesterday a user registered on my site (Russian ip) I searched his mail on google, and found it to be a spam bot (crawler).
So i deleted the user, and after 5 minutes the user was created again.
So i found this plugin:
WordPress › Ban Hammer « WordPress Plugins
with that you can block Ip's from being able to register, also it got support for:
StopForumSpam.com
I did not block his ip, StopForumSpam actually stopped it.
a website where all mass spammers/crawlers are being reported.