I for one am tired of watching myself get tracked by every website out there, because that is what it has come down to. Google, Yahoo, Bing.
I'm not logged into any of them, but any site that I visit on my own accord.. if it sells anything, 5 minutes later I'll be on a completely different website and see ads for that site running. Now, I know google used to do this when you were logged in.. but now I see it everywhere.
