SEO Spammers - Ban them!

@php_rocs: Sorry about that. Must have missed that thread.

@ciadmin: I appreciate your work here, it's hard to keep track on everything and I know it's not my forum and all. But a normal user don't add a SEO link in the signature and then make a post (on their first post). Sure it get's deleted (the link) but I have seen some cases there the user still keeps adding it. And they are still here posting incorrect code and giving bad examples. I would just ban those people directly, but that's just me.
I haven't worked with MyBB, but are there a way to disable signatures for new users (Junior Members)? That would at least make it easier to keep track and you don't need to look at the signature link all the time. And would be easier for us to report for you guys.