content: Observation selection bias. You don't see the people that don't film it, but obviously some violent and stupid person will do it eventually. There's no slim chance of a person being both violent and stupid -- most who are one are also the other, right? You see what I'm getting at? It's the same as when a person searches for a video of a bear attacking a person and then while watching it they say to themselves, "omg I can't believe this person is just standing there filming this!" So yeah. Maybe 1 in 100,000 people who beat someone up upload a video of it, maybe it's 1 in 2. Can't know from this. (Observation selection bias has important implications in wondering if we're alone in the Universe. Saying "there must be shitloads of aliens because here we are", like Carl Sagan did, is just dumb). Sorry for the tangent, I just see people doing this all the time.