I can say, with at least some pride, that I've made it this far without even looking into AdBlock almost specifically because I get it. I don't like ads, but I get why they exist. That said though, as you said Jim, I also get the other side of it. GameFAQs alone has done a lot to test my patience with the way that they've forgone pop-up ads (which most browsers block by default these days) to just smother the website itself with a massive ad; seemingly trying to trick me into clicking on it with the way that it'll pop-up conveniently just as I'm about to click on the link for the forums or the FAQs or the search bar or just whatever I'm there to check. GameFAQs is also notorious for allowing such intensive ads that it will actually lock-up my browser in the worst of times, and make it a sluggish mess to navigate their site in the best of times.
Thus far I've held onto my will and simply not gone to their website for a while when they pull that bullshit. Rather than insisting that I'm entitled to their content for "free" (if we're willing to count my mere presence as a form of payment), I simply don't use it. I'll look up a guide somewhere else, or go make conversation on someone else's forums. So I guess that's another reason I don't use AdBlock; I get why ads exist, and on top of that I have no qualms taking my business somewhere else when the ads DO drive me to the brink of wanting to use such a program.