Strange referrer

[lutetia]

Hello All,

Noticed a strange referrer in my StatCounter logs today.

Does anyone know what this could be? The part that raises a red flag is "Click Handler". This visitor visited only the landing page but triggered three Google Adsense exit links, all at the same time.

cs.dogpile.com/ClickHandler.ashx?ru=http%3a%2f%2fwww.mydomain.com %2f&ld=20111109&ap=10&app=1&c=info.dogpl.t2.8&s=do gpile&coi=239138&cop=main-title&euip=152.157.78.172&npp=10&p=0&pp=0&pvaid=3f 9c7ddbb57540c5b8eb50b8f05a0a54&sid=1830193568.5093 45215105.1320859588&vid=1830193568.509345215105.13 20859588.1&fcoi=4&fcop=results-bottom&fpid=2&ep=4&hash=414EA416793BF5AAB7B731E5EE C3A327&adultfilter=heavy

The user is located in Bothell, Washington, US and is identified as Washington School Information Processing Cooperati (152.157.78.172)