I’ll jump in- why care? Because it sucks to have people taking pot shots at you. If it is just one, then sure, that isn’t so bad, but when you have a group doing it, it can become existential. You may not have seen this type of violence before but it is unsettling. A group of people can do low effort violence that feels fun and harmless to them (each taking a lazy swing at someone), but the cumulative effect can be beating up or killing someone. Getting yelled at, or having someone write threatening things to you, is not as bad as being punched or having a stone thrown, but it is still damaging to humans.

Not all hurtful and harmful behavior is violence and we need to maintain the distinction.