So sad that we have to be protected from ourselves.
And you don't have to be up front to fool around with the aircraft, at least on some types. Forty years ago my younger brother recounted with great glee how to throw a PBY5A out of trim from the back just by pulling on the overhead wires. Of course the pilot knew exactly what was going on (his own son was instructing which wires to pull) and, in response, would employ his own methods of scaring the living sh1t out of the kids in the back.