What really annoys me is all the websites who just mirror mailing lists onto the web. So you use Google and get the same page just with different banner ads, and the same - usually wrong - answers.
"Update: For those of you who can't identify irony: the fake screenshot doesn't actually stray far from the truth."
StackOverflow works just fine, this guy posted a joke screenshot as evidence that it does not. Who's the moron here?