I know there already exist some threads about blocking google-bots while geo-blocking the USA. And i know that you are not a friend of geo-blocking, Nicholas :-) Our situation is the following: We have many spammers and hackers trying to login with a couple of passwords from all over the world. Our real users come from about 5 countrys. All other country-accesses are bots or spammers. We made many tests with logged IP-adresses of those spammers. They come from south-africa and so on. So in my opinion geo-blocking is a good tool to lock out those spammers. The only problem is, that it also blocks the good bots.
Google itself had a solution for this problem. Is it possible to get this solution into ATPRO?
Here's the link:
http://support.google.com/webmasters/bin/answer.py?hl=en&answer=80553
http://googlewebmastercentral.blogspot.com/2006/09/how-to-verify-googlebot.html
Otherwise, if you know a good solution to block those spammers, that can afford to create an account even with a recaptcha-tool as security, and spamming our forums, please tell me :)