Cracked has the latest 5 scientific reasons why people act like, umm, jerks. (If crassness bothers you don't click that link! If you think crass is funny, then what are you waiting for?). Reason 1: angry people get more attention:

When the Bangor scientists studied the section of the brain that responds to angry, happy or neutral faces, they found something interesting: This area is also tied closely to areas of the brain associated with survival instincts–like your fight or flight reflexes. When you detect anger in your vicinity, your facial recognition center suddenly lights, allowing you to better detect possible threats. Or, as one researcher puts it, “The ability to remember who is angry may have been of evolutionary importance in enabling us to respond to a threat situation. Remembering who’s happy is less important as it bears no relation to our own immediate safety.”

While you're at it (it being wasting time on the internet), check out Cracked's True stories behind 5 famous WTF images. You may be disappointed to learn that Professor Badass is not actually a professor. (I'm sure most of you aren't surprised.)