Do any of you use them? I do.
Let's be fair. A lot of internet content is free to view, totally, but a lot of it is ad supported. Without the ads there would be fewer free sites, therefore less choice, and harder to find information. That is why I use my ad blocker 'responsibly', i.e. some unobtrusive ads are allowed. What I do not like are Flash ads or animated GIF ads or ads with sound. Those I block vigorously.
Google has now announced that it will release its own ad-blocker for its Chrome browser. This will allow sites to ask for the user to turn off ad-blocking or make a payment to view, it will also block specific ads that do not meet Google's standards.
Some sites already ask me to turn off ad-blocking in order to view. If I refuse some of them accept my choice and still allow me in, others either dim the page or redirect me to a locked page. The system works, for both sides.
My message to Google is this: I you think that I am going to give my card details out willy-nilly to make a payment for a site I know nothing about you have another think coming. As for your own standards, they are ever so high, aren't they? Or maybe not.