Just a quick post to let people know if they hadn't seen it in the other forum that my script badblock is now in a very usable state.
BadBlock reviews wanted
Download from badblock - Project Hosting on Google Code
This script allows you to detect adblock, block specific countries, blocks bad bots etc.
It's free and it's very easy to setup with just a tiny bit of php knowledge.
Future updates coming, but not as quickly as the current release is very stable and functional