8-bit philosophy explains: Why do haters hate?
What's the difference between a critic and a troll? For the answer, look to another video game-inspired episode of 8-Bit Philosophy.
Our narrator draws the distinction between Diogenes' definition of cynicism: taking risks, relinquishing social status in favor of one's views, not being impressed by social status. The hater, on the other hand, "just stands back from the crowd in order to pass judgement, but they don't actually do anything in support of their professed view."
For a field study, just scroll to the comments.