Fuck that, should be legal to drive into them at up to 30mph (80% chance of survival) if they're coming at you. If the law, the teens' moral conscience and their parents didn't do their job, other repercussions need to happen to change their behaviour. Stop enabling these kids (same for adults). Start out polite, but can't let these things slide in society. Society needs standards. Just got to be careful, some of them carry knives - fuck that.