every time i hear about tracking like this, i start to get paranoid and think about trying to restrict my trackability. But then i remember that if i search fo

every time i hear about tracking like this, i start to get paranoid and think about trying to restrict my trackability. But then i remember that if i search for (to give last week's example) a new travel mug on amazon, and then buy a new travel mug on amazon, i continue getting "retargeting" ads from amazon for the exact same product for two weeks after purchasing it. If amazon can't figure out whether or not to advertise something to me after i've already bought the thing they're advertising while i'm signed in to their website, i don't have much faith in anybody's ability to fingerprint me from unauthenticated sessions across multiple mediums and multiple companies. I can believe somebody is trying to sell a service that claims to do this, but i don't beleive they actually can.