the problem often in conflict is that the incentives aren't symmetrical. if you and somebody exactly like you are put in a ring with a knife each, you'd both have the same things to lose. but often times in real life, and much more so online, one of you has a lot less to lose.

in a conflict in the street, if he gives you a brain injury, you might lose your job, mortgage, family, etc. it's just his next stay in prison, he has nothing more than his freedom to lose for the 5th time. if you give him a brain injury, you might lose your job, your mortgage, family, etc. he'll spend some time in hospital and then he'll be back on the street doing the same thing in a year.

online, it's worse, because now you can be matched with the bum with the least to lose within a 50 miles radius.