Bandwidth cost money. Why should I pay for ads when I go to a website? Every time these ads are automatically downloaded to your browser it is costing YOU money. And they got the NERVE to say it is costing THEM money!
I never would have installed an ad-blocker had most websites adopted that practice.
But the web ads got too obnoxious. I got sick of a pop-up ad covering the text of what I was trying to read and then having to find the hidden "X" to close it. Sometimes I could never figure out how to close an ad and I'd have to leave the website and move on.
In that, AdBlock was a godsend. As soon as I installed it, I was surfing the web again like it was 1997 with a cable modem. Everything nice and clean and fast.