1) YouTube comments in general (but some people are fun to troll, esp. Bronies)
2) Political debates on the Internet that go nowhere (oh, wait, that's all of them)
3) Doom and gloom threads on any forum without factual information or other legitimate (see: reliable) resources
4) Ads that scroll up/down when you scroll up/down a page; it's like they're trying to absorb your soul or something
5) When YouTube is buffering a video and when it gets halfway down, it decides to change to a higher resolution and makes it buffer even slower, then I have to wait for it buffer once more
6) Facebook spam or chain letter posts "Wow, I can't believe I won a $500 gift card at Walmart!" or "If I get 1000 likes, my brother will stop wanking in public!!!!1!1" or some BS like that. Seriously, it has to stop
7) Facebook "games" like Farmville, or any "ville" games by Zynga. They need to be eradicated from the face of the earth.
8) Netflix and its persistence to wanting to share the videos I watched on Facebook. Who cares what I watch?
9) People who hate something for no reason whatsoever without being able to debate as to why (See no. 3)
10) People who hate people for owning exotic animals and begin to shove their PETA agendas up their butts, trying to bitch that owning an exotic animal is somehow immoral when the animal is clearly loved and taken care of from the owner. Animal activists need to burn in hell.