FlightAware shows this flight leaving 46 minutes late and arriving 26 minutes late. Not bad for a 13 1/2 hour westbound flight.
While I find it unacceptable for any airline employee (or child of an employee) from acting in such a manner the activity does not seem to have caused any hardship to any of the paying passengers on board. (The flight arrival not being significant different than preceding/later flights. The day after the flight left 12 minutes earlier and arrived 2 minutes later)
As for charges? What charges? Unlawful interference with an aircraft? I don't see that.
Other than for readers of the Daily Snail, and similar, I don't see a real story here.