Please also ban/block:
http://forum.eurobilltracker.com/member ... ile&u=9509" onclick="window.open(this.href);return false;
http://forum.eurobilltracker.com/member ... ile&u=9510" onclick="window.open(this.href);return false;
http://forum.eurobilltracker.com/member ... ile&u=9752" onclick="window.open(this.href);return false;
(see their user notes for more info)
And maybe it's time to implement better spam prevention.
Here are some suggestions. The one that checks whether or not a user took more than 5 seconds to register is very nice, as bots fill the form in within the blink of an eye. And the one that hides the "website" field from the registration form is a great one as well.
And maybe we need better CAPTCHAs, such as recaptcha.