Leonard0 - 1:49 pm on Oct 28, 2011 (gmt 0)
...they keep creating more subdomains that I have to then block.
If you are blocking the referrals in htaccess, it should be possible to block all subdomains with one line of code - just leave off the http:// www. part.
Here is the Adsense help section for invalid clicks:
There is a help item on sabotage that provides a form where you can report incidents.