Sgt_Kickaxe - 4:20 pm on Dec 14, 2011 (gmt 0)
Attempting to trap and block offenders will always be an ongoing game that you are forever in the catching up phase. Get pro-active about limiting potential damage. The best way to do that is to minimize the impact a botnet can have by reducing the overall size of your pages and serving up proper cache versions as required.
A side benefit to this is that your site will load faster, always a good thing.