Went to the UK in 2016. There were cameras everywhere. Public trash cans were simple hoops supported by a pole with clear trash bags so you could see what someone put in them (bombs). This was even seen in the suburbs. All because: people behave a lot differently today.
It's gonna happen here too, eventually. Keep throwing those snowballs and see where we end in a few years. And then the same people will riot over lack of freedoms.