Agree with Scritty. What drives me nuts are the news sites. They're turning into a wasp nest of ads.
You click a site and 4 ads start loading in sequence from every direction, freezes your browser, you mouse hovers like it's drunk / having a seizure, you gotta keep closing ads just to scroll and close more ads. As these ads are being loaded the content is slipping & sliding like bubbles and you feel like you're playing target practice. At which point you begin to wonder "how bad did I really wanna know w/e the fuck I was searching for?"
Then your speakers blast off at 80 decibels... you don't see a video ad.. maybe it's at the bottom right. You shut your speakers, close that just to see another ad is loading in the main content area before a video you don't wanna watch. You just wanna read a few sentences about some female terrorist. But now your mad, you click back over and over waiting for a wormhole to open and send you back to Google. Then if your dumb like I am you click another site. Thinking it won't be as bad. Another ad sequence begins you immediately hit back before anything can load. Now you realize you don't fuckn care what the terrorists names are. You don't care who they kill they probably got all their news from Google.