I think this is much different than these teens who are trying to make sure they hit you hard enough to knock you out and the fact they aren't hitting other teens, they are hitting old women and defenseless people. They are such cowards, they don't dare go after anyone who might hit them back. There has always been an element like this, but it was somewhat rare to involve the kind of people they are targeting. With social media, this will spread. It will give other creeps the incentive to do the same. It will also give the ones who push others into doing bad things, something else to push them into doing.