I don't mind advertisements one bit. What I do mind are security risks on my machine. As a result I don't have flash on my machine except by default through Chrome browser which I run only when Safari can't display said content). If I were running a website that relied on advertising, I'd probably just have a 'donate' button and where the ads would have been displayed were the user not using Adblock, I'd default to a considerate call to action asking them if they'd care to donate to make up for the ad revenue we're missing out. I think most people are pretty reasonable. They aren't cheap, they just don't want to a) be annoyed, b) get spammy virus shit ju-ju on their box. I've seen what banner ads and pop ups can do to a machine. They are probably the number one way security is compromised for the average user, so the steps I take to prevent this take down an overwhelming majority of benign adds in the process.