It's certainly an interesting thought but I believe it may well be true - the travelling public are now probably the single most effective weapon against future hijackers.
On Tuesday, most - at least in the initial stages where the terrorists took control -would have believed in the overwhelming historical precedent that their lives were not in immediate danger. And, of course, they also would have done exactly as ordered to save the lives of hostage cabin staff.
Now everyone's perception has changed.
I wouldn't fancy any would be hijackers chances now against 200 passengers who all believe their survival can only be assured by neutralising the threat. Of course, this may also mean public lynchings of those perpetuating air rage incidents. Not necessarily a bad thing though, that.