@kestrel I don't know how much I agree with that. What we choose to do with how we feel--the public restraint we choose to exercise--is part of who we are. And it's not just a lack of consequences that influences our actions online; empathy is much harder to come by when you can't see or hear a person. And that's not an intentional issue--just think how many fights start on this forum because people misunderstood something written they'd never have misunderstood in a face-to-face environment.
It doesn't excuse consciously acting like a jerk, but I think it explains why people sometimes do. It's not that they don't care that people are upset; it's that they don't see it.