The Better Advertising Project, with the basic idea to profile end-user ad-blocking activity on the Internet and to resell this data to advertisers. This might be OK with some people, but for me, personally, it's just too close for comfort.
Why do you block ads? It's a leading question, and the answer is likely to be that they are annoying.
But why are they annoying? If you drill down a bit, then it's not because they blink, but because someone somewhere thought that you should see their ad. Because they made a decision for you, without asking, and it's not a decision that you would've made yourself. Similarly, any sort of reporting, anonymous or not, falls into the same domain - someone somewhere decided that you should be OK with it. I don't appreciate this. It's not what they do, it's the fact that they thought they could do it. It's ethics. I don't have a problem with someone accidentally farting in a room, but I would have a problem if someone had a choice of walking out, thought it over and then proceeded to do it anyway.
It might be OK with others, but it's not OK with me. HTH.