How far it[ed] needs to go is on them, not on us.
If they stop doing it after training, then training is the proper response.
If they stop doing it after punishment, then punishments is the proper response.
If they stop doing it after protests, then protests is the proper response.
If they stop doing it after riots, then riots are the proper response.
If they stop doing it after goddamn SuburbanTurkey finally gets to watch the his dreamed "I'm still not over the fact that I missed the 60s" uprising from the safety of his couch, that is the proper response.
Can't argue with the simple logic of this other (sans the dig at ST) than to add that;
If rigorous recruitment polices and screening weed out the majority of bad apples then,
As a starting point.