yeah, so maybe the police do bugger all about these things, but personally don't take shit from anyone, not saying, go and stab them, but in a group of people, just circle the 1 who through the stone, and put the willies up him (no, not gang rape), just scare him, and chavs being chavs will shit themselfs, he'll think twice before he tries anything beofre, failing that, baseball bats and f**k him up good and propper violence does solve stuff,