Interesting, I often hear this described as a peculiarly (or at least mostly) American phenomenon, but that's well beyond the type of thing I'd imagine happening in even the hyper-sensitive US city I live in. I know I'm being a little reductive here, but your story is a pretty substantial outlier relative to what I'm used to.
I know in Switzerland there was a story about some of the young left party going around putting stickers on SUV saying "I also am a tank" and they got a lot of flack for this 'property destruction'.
