We have come a long way since the days when flying was a luxury experience. I don't like the idea of weapons on planes, even non-lethal ones. As pointed out, they can be turned against the crews. Trained air marshals are another matter. There should also be better restraining devices available, so once someone is subdued, it doesn't have to be done again.

The problem is easily avoided, don't be a dick on a plane or be dealt with

Better solution: trap doors under each seat. No parachutes.

MikeB4:

 

The problem is easily avoided, don't be a dick on a plane or be dealt with

 

I think the issue is more whether it's safer to have the flight attendants armed with tasers and whether there's sufficient training involved - it didn't sound like the Korean Airlines staff had any/enough training on how to use them and could have potentially made a bad situation worse. An important part of the training should also be WHEN to use them.

MikeB4:

 

The problem is easily avoided, don't be a dick on a plane or be dealt with

 

Not enough information is provided to establish that the guy was being a dick. He may have been having a mental breakdown or psychotic episode. He needed to be restrained for the safety of others. That is all.