Yer but no but, I take your point but passengers have been known to do far worse things than simply try to open an impossible-to-open door without the crew feeling the need to take a really really expensive step (both in cost and airline reputation) such as a diversion. I guess there are some first time fliers who may be disorientated and not realise what they are doing when they try to open an external door not meaning to cause a threat. Would a plane divert under these cricumstances?
What actually happens if someone at 35k' tries to shift the door handle to the open position and they are not detected for a moment or two?? Just curious really.
Surely there must be more to it than just wanting to get an idiot off the plane which would be welcome I'm sure. Suspect we dont have the full facts about his behaviour.