The best thing to do....call the cops. Press charges for trespassing and disorderly conduct.
Call the cops, wait 35 minutes, and risk that the cops will shoot your kids?
You sure you've thought this through
They'll resist and cops will shoot a couple. Oh well.
But the others? Court can make them pay restitution for lost revenue. Manager can tell all customers to leave immediately. Then tally up the bills..and make the savages who get arrested foot the bill.
Which they wont. And they'll end up in jail. **** em.
In America, one doesn't go to jail for a civil tort. Even if the restaurant won a judgement, it would be impossible to collect.