my experience for sharing in Canada
about one month ago, I phoned police office and complained that someone was always throw glass bottle or eletric bulb to my yard, which make my family very nervous and I was worrying that someday, my kids would be hurt. The glasses spread everywhere. I believe that's some teenage did this with race eye.
It happened 4 times and fortunately, this teenage moved out from my community and since then it never happened again. (I wish)
Tonight, the police phoned me back and follow-up my complain, which I can nerver expect in China. Although the police may not be able to do anything for this, the police is very reponsive or the police system here is pretty good....