gregbo - 5:51 am on Dec 2, 2006 (gmt 0)

The first should be done anyway - to make sure it doesn't suffer a denial of service attack. Regarding atypical traffic - it depends on the source really (referring page etc) as to the effect it'll have.

Referring page, etc. can be easily faked. It's unwise to put much trust in it. It's better to monitor your site for any anomalous behavior. Of course, anomalous ad clicking behavior is a subset of anomalous site behavior.

I agree that disabling ads on a specific page/site might be a precautionary measure - it all depends what faith you have in Google to detect and filter out this sort of thing based on IP address, user agent etc etc....

Seeing that some people who have claimed innocence have been banned, what other recourse do you have that will reduce the amount of risk that the advertisers are being exposed to by "invalid" clicks?