Even if every ad was "well behaved" I'd still block each and every one of them. The privacy implications of being constantly tracked in order to sell me bullshit are too creepy.

Frankly, if your business depends on ads, you should think about a different business model, because the NSA spying thing is partly your fault. There are many things that I already pay for on the web, and many more that I would happily pay for if they offered me an ad and tracking-free experience