Hah.

From Google:

It has come to our attention that invalid clicks have been generated on
the ads on your web pages. We have therefore disabled your Google
AdSense account. Please understand that this step was taken in an
effort to protect the interest of the AdWords advertisers.

Hah, this was caused by one person and it wasn't me. I never cared about the ads and wasn't gonna get paid anything anyway but for someone who actually might care about their ad revenue it seems pretty easy to disable an account.