Well I am not buying it that airliners are so weak that some pilot or terrorist could intentionaly wiggle the tail loose. If that is the case, something is wrong with the hydros or the tail or the sensors or limiters that allow such actions.
Maybe the solution is to take the hydros out of it, make it all cranks and levers. If the pilot wants to put some rudder in, make him work for it, fight those aerodynamic forces, just like the rest of us in smaller planes that can't even imagine having enough legs to knock a tail off.