At the risk of asking the bloody obvious - how many times have stuck pedals happened (aside from the UH-1H and earlier machines)?
Aren't we practicing something that happens so rarely that we're confusing the bejeesus out of people for no good reason, and setting ourselves up for things that (almost) never happen?
There is almost nothing in the tail rotor control system of most helicopters that is going to jam the pedals (unless it's something falling into the cockpit controls part), so how exactly will this 'emergency' happen?