Ah, people like you make me laugh. Full of idealism, without a clue how the things you consume come about. I bet you were shocked when you found out your Nikes came from a sweatshop in India, eh?
Do you honestly think that large and ethical businesses just appear? Do you think that we wake up one morning with a million pounds from The Business Bunny (tm) that lets us create a sales team with advertising standards and guidelines? No, small businesses and start-ups have to chose a compromise between editoral integrity and feeding our children. I personally draw the line at pop-ups, pop-unders, crazy frog, and a bunch of other things, but when you're growing sometimes you just have to lube up and take one for the team in the hope that one day you can tell someone with a flash video ad in blue and purple to take a hike.
And please - stop with the "change your business model" crap. There IS no other viable business model. Either come up with one yourself, or just shut up and ignore them (the ads) while you enjoy your content like every other non-moron out there.
Every time you whinge about the injustice of ads while you're getting free content that someone else has paid for (in time or money), baby jesus kills a kitten. Fact.