varun21 - 5:58 pm on Feb 21, 2013 (gmt 0)

I saw this as an activity that looks like a targeted attack that would raise flags for the adsense monitoring filters. They were direct visitors. All from France and using Google translate. And amongst all the IPs, there was one repeated about a 50 times or more. Suggesting the guy left the pages reloading and could have waked away for a coffee. The entire thing lasted for about 40 mins. 5 times the daily traffic coming in within half an hour and from a specific geography. Would certainly raise red flags to the Google monitors. Makes it look like traffic purchased. And remember invalid clicks covers invalid impressions as per google.