Nah, you literally just ground the plane whenever someone does something that rises to that level. Any threat someone could bring on a plane that could take it down is easily found by a bomb dog.

Part of their training includes risk assessment that teaches them to sacrifice individuals if it is in favor of maintaining control of the plane.

They flat out train them to shoot through a hostage someone is holding. That one person’s life isn’t worth sacrificing the lives of hundreds of others on board as well is casualties on the ground.