In a post on VPT’s blog, I explain how rogue affiliates don’t just conceal their misconduct, but make it look like their traffic is coming from a totally unrelated site. Surprisingly simple tactics can even manipulate HTTP Referer headers — data that many analysts consider trustworthy since they are set by browsers rather than web sites directly. Fortunately, VPT automation catches, processes, and even tabulates these violations. Details: Traffic Laundering and Referer Faking.