[templaters]

I had the same problem banning the ip doesn't help, banning the username doesn't help.
I finally found a solution that works for me,

If you forum is about a topic that the real members that join your forum should know something about , then thier is a hack that lets you put a question in that the new registrations must answer, correctly.

This will stop the bots,

So if your forum is about lets say horses,

I would have the following question, you need to keep it simple, but effective.

what is the height of a horse measured in?

answer = hands

Be supprised how that will stop the robut and most of the spammers.

The hack is called spam stop I think

Hope this helps

Otis