londrum - 4:29 pm on Mar 13, 2010 (gmt 0)
even if you're saying you dont buy anything from ads, and believe that you're ignoring them, that doesn't mean that they are totally wasted on you.
advertisers might be building up brand awareness. if you visit a site about sports shirts, and every other ad is for nike, then the chances are that when you want to buy some further down the line, you'll remember that nike sells sports shirts. just because you never click it or go out and buy something doesn't mean that the advert is wasted on you.
that is an example of an advert that is totally benign. how can users object to those? the user might only see it for half a nano-second out of the corner of his eye, but just because he visited some dubious site with pop-ups six months ago and installed the adblocker, every innocent site that he visits from now on which gets paid by the impression loses out.