r4bet - 10:38 am on Sep 20, 2012 (gmt 0)
Hi jost -
I would take advantage of some of the tools available through your AdSense account to try and isolate where you feel these issues are coming from. Maybe you have already, but I'm unsure from the information provided in this thread.
We have provided an article at [support.google.com...] that describes ways to segment traffic. This might shed some light as to where users are coming from and which ad units are affected. Hopefully this can help you isolate any issues and take action.
Hope that helps!
no john this wouldn't help. actually on google display network only very big sites are ~safe. small publishers have to be lucky attackers don't threat them.
this problem can't be solved on display network with small publishers because all of webmasters are not honest. so if a webmaster effected by attackers and claim oh that fake clicks was not me please don't close my account there is no way for google determinate its true or false because if webmaster really effect by fake clicks from a large bot net , all factors looks same as real clicks. if google don't close account all webmaster will try buy fake clicks and when it discover by google that looks not natural claim whoops that wasn't me ...