recently I have been doing some searches on both the google shopping site and amazon. And now my search results are popping on every general purpose website and hobby site I visit. I get it that amazon and google properties are sharing search info but when it's another site like a wordpress etc... it get's frustrating that there may only be a few advertisers and aggregators(sp) any more. That "big brother" shit that people worry about with the NSA is nothing compared to advertising.
Google offered a security check this afternoon. Beside a few web sites that I no longer wish to authorize there was one that I had never heard of before. And if you ever want to be scared shitless... search "gigya". "de-anonymising"