As others have mentioned that doesn't work, check out the news archives and kids were subway surfing in NYC one locomotives ran on El Tracks. They didn't scare those kids either, pretty hard to scare a kid that seen more death and poverty at 10. What we're witnessing is society repeating itself and not learning any lessons. Kids left to their own devices do dumb shit, somebody didn't think a swath of kids was worth it, now that their acting out is getting attention, so now let's do something about it. But no really wants to make the major shift to society that would lead to lasting change.

Probably New Jersey to, Jaws may have been inspired by a summer of shark attacks back in the day. On the last attacks of the summer was in a fresh water creek. Sounds more like Bull Shark then a great white.