This is starting to turn into something that needs to be more of an in-person discussion, because there will be several issues with that.
Such as how is it supposed to know when to go ahead and send the less-than-6 bans instead of waiting for another. Because you can't know if there will be another repeat until it happens.
Weren't you the one who had a pushmode script that was already doing some of this?
One thing that this system would need to do is remember which bans have been made recently so it doesn't do the ban again if it's same nick doing a repeat, or if it's a 2nd nick matching the same banmask.
etc.
