Never_again - 5:51 pm on Jan 12, 2005 (gmt 0)

I'm with EFV on this one - you can take paranoia too far!

Exactly. An IP address is just one of many data that Google must use to determine click fraud and there has been no evidence that anyone has every had their account closed because of the computer they used to check their stats.

Simple solutions is to just ask them never to click on any AdSense ad on your site and why it would be bad to do so.