Foren / Cotonti / Support / Rewrite rule to "kick in" before default Cotonti response?

Yeah, I see I have not enabled those.

Is there some additional info available anywhere about those settings? I did some searching but could not find anything.
I am not banning his IP's yet, I want to see how stupid he is and maybe uses a recognized IP at some point.

Added 2 days later:

I enabled this and used the default settings (Adjust Shield timers (in %) : 100 and Anti-hammer after * fast hits : 25). Thanks for the tip, I can see a lot of bans so it is doing its job.
But, I also saw the msn crawler is banned every now and than. I dont care so much about this one but I was wondering about the google crawler. Is there any way to allow specific IP's or maybe specific crawlers? So they are not banned by this configuration?