Also, report policy violations to Google.
https://www.google.com/adsense/support/bin/answer.py?answer=18386
How do I report a policy violation?
We regularly review sites in our program for compliance with our
program policies. If you notice a site displaying Google ads that you
believe is violating our program policies, please let us know and we
can investigate the issue further.
To bring a site to our attention, follow these steps:
Draft a new email. If possible, please use the email address currently
associated with your AdSense account
Write 'AdSense Policy Violation' as the subject of your message
Please include all of the following in the body of your message:
The URL of the violating website
A description of the violation
The specific location of the violation, if applicable
Send this email to adsens...@google.com
Your feedback will assist us in maintaining the quality of the AdSense
program.