The comments sections in TED videos and the more serious Youtube videos are often full of weirdos. Neurotic, abusive, weirdos. It's probably the biggest problem with the internet. Related to, but separate from, the uncivilized manner in which people interact with each other.
It really makes me wonder, are 90 percent of people in the world like this, with the self-control to retain composure in public? Or does the internet just get filled with the shouting of a vocal minority?
I'm going to be optimistic and say that it's the latter...
Though I often feel it's the former.