http://www.pcmag.com/article2/0,2817,2353942,00.asp
I say spyware. I've gone overboard on my cookie settings and my adblocker has taken on a life of its own, waving a swastika every now and then every time I load a page. A few of them cross the line though, I don't consider it "permission" to track what I do just by connecting to your page. If I register or contribute, then by all means show me your privacy policy.
One of the many reasons why I don't use gmail, the so called "targeted advertising", aah yeah right 
I will not use anything that tracks my behavior, they can kiss my ass.
I just use Adblock Plus, stops all ads in their tracks no problem and NoScript stops whatever I miss with Adblock. Result: Pretty much no ads get through.
Once they stop tracking, I'll loosen up my settings a little.
"One of the many reasons why I don't use gmail, the so called "targeted advertising", aah yeah right "
Holy crap I never even realized that... well goddammit I love Gmail... now what am I going to do. :S
Well, nothing of that sort is happened to me and I am least bother what its all up to. Lets see.
