I don't understand why people are so enamored of personalized ads. Advertising was around a long time before personalized ads were even a thing, yet it managed to still work by targeting publications that matched the target customer. This was accomplished by geographic location, for general consumer ads, or by interest, for targeted ads, B2B, etc.
I had targeted ads ruin a surprise gift last year. Bunch of ads showing up made it very obvious that I was looking at (and bought) a thinkgeek gift for the girlfriend. That was one of the moments that made me sick of such laser targeted advertising.
Additionally my browser is set to clear cookies on exit, so even if I make a mistake, just turn it off and on again to wipe. I have exceptions set for the three sites I like to stay logged on to (via Page Info in Firefox).
(and simply no Facebook, obviously)