Nobody loves ads, but they keep content free. If you want to pay for Netflix, Hulu+, HBO Go, Showtime whatever, Slashdot Premium, Facebook PRO, LinkedIn LOL j/k, nobody wants that, or whatever else, then fine. But if you're not paying for it, you're being a bad internet citizen by blocking ads. Block Flash, sure. But the rest? Just let it do its thing and remember that it's keeping your beloved content alive and free.
As a caveat, I do long for the days when a website (let's go with CNN here) doesn't need 150 MB to load fucking home page content. Everything is so bloated. I'm fine with ads, but can we work on tuning some of these pages? I don't even want to visit some sites because of the toll they take on my system resources. And to your point, I'm sure half of that is ads.