It's not ads per se that are annoying, it's how they affect the browsing experience. Reading Slashdot a few seconds ago - I read one or two sentences of an article, then an image loaded and reformatted the page and the paragraph I was reading disappeared. Found it again, read half a sentence and another image loaded and it disappeared again. I don't have time to chase my article all over the screen. On other sites, I'll read half a paragraph, then it will suddenly wipe everything out (not just scroll it off the screen) while it tries to load some huge object from the network. Or half the page will come down, then stop while it hangs trying to do a DNS lookup or load a giant Flash video from some ad network that's not responding, but none of the remaining text will load while it hangs. This happens so much that I've either stopped reading some sites, or installed ad blockers on computers that I use often. I don't hate the ads - I maybe click on one or two a year - if that's enough to keep things profitable I have no objection. What's unacceptable is the way they negatively impact what I'm actually trying to do.