An excellent overview of where web advertising is and what lines it has crossed. This bit is particularly relevant:

This won’t be a clean, easy transition. Blocking pop-ups was much more incisive: it was easy for legitimate publishers to avoid one narrowly-useful Javascript function to open new windows. But it’s completely reasonable for today’s web readers to be so fed up that they disable all ads, or even all Javascript. Web developers and standards bodies couldn’t be more out of touch with this issue, racing ahead to give browsers and Javascript even more capabilities without adequately addressing the fundamental problems that will drive many people to disable huge chunks of their browser’s functionality.

Read on Marco.org