Oh well, I got this email last week:

Hello Steve Collis,

It has come to our attention that invalid clicks and/or impressions
have been generated on the Google ads displayed on your site(s).
Therefore, we have disabled your Google AdSense account. Please
understand that this was a necessary step in order to protect the
interest of the AdWords advertisers.

A publisher's site may not have invalid clicks or impressions on any
ad(s), including but not limited to clicks and/or impressions generated
by:

- a publisher on his own webpages
- a publisher encouraging others to click on his ads
- automated clicking programmes or any other deceptive software
- a publisher altering any portion of the ad code or changing the
layout, behaviour, targeting or delivery of ads for any reason

These or any other such activities that violate Google AdSense Terms
and Conditions and programme polices may have led us to disable your
account. The Terms and Conditions and programme polices can be viewed
at:

https://www.google.com/adsense/localized-terms?hl=en_GB
https://www.google.com/adsense/policies?hl=en_GB

Publishers disabled for invalid click activity are not allowed further
participation in AdSense and do not receive any further payment. The
earnings on your account will be properly returned to the affected
advertisers.

If you feel that this decision was wrong and can maintain in good faith
that the invalid activity was not due to your actions or negligence or
those of the people that you are responsible for, such as employees and
family members, you may appeal against the closing of your account. To
do so, please contact us only through this form:

http://www.google.com/support/adsense/bin/request.py?contact=invalid_clicks_appeal&hl=en_GB

If Google decides to evaluate your appeal, we will do our best to
inform you quickly and will proceed with the appropriate action as
necessary. If we have reached a decision on your appeal, subsequent or
duplicate appeals may not be considered.

Yours sincerely,

The Google AdSense Team

Apparently I have been doing something wrong, not sure what as I had been following the terms and conditions (like it wouldn't be hard to track if I clicked them thanks to cookies! I are smart like that ). I put in an appeal asking them where the problem was (which site was the problem as the ads were on three sites and what to look for) and got this response:

Hello Steve,

Thank you for your appeal.

After receiving your response, we re-reviewed your account data
thoroughly. We have reconfirmed that invalid clicks were generated on the
ads on your site in violation of our Terms and Conditions and programme
policies.

https://www.google.com/adsense/terms
https://www.google.com/adsense/policies

We have implemented these policies to help ensure the effectiveness of
Google ads for our publishers as well as our advertisers. According to our
policy on this matter, we are unable to reinstate you into the programme.

As you may know, publishers disabled for invalid click activity are not
allowed any further participation in AdSense. For this reason, you may not
open a new account.

Please bear in mind that subsequent or duplicate appeals may not be
considered and you may not receive any further communication from us. We
appreciate your understanding.

Sincerely,

The Google AdSense Team

Nice to see that they read my request and answered appropriately. At this point I realised it would be quite silly to bother appealing again as they aren't even reading what I'm saying so I removed all the ads and got on with life. In my way of protest I have removed all Google products (they are spyware anyway so no big loss) I had and changed all the search options.

Oh well, its their loss.

Later,
Steve