Lol HotDog, somehow I doubt the fun police would be all over that one today... I've always thought it a pretty valid action in the event things bcome severely disruptive...
Speedbird, it's not always that easy. On a couple of occasions I've had passegers kick off after t/o... they appeared fine and in full possession of their faculties on boarding... some people have just learnt to hide it very well for the crucial time of boarding...
It's much harder to do anything after take off, I know... but sometimes it's not down to the cc... especially on international flights- it's ground crew who do the boarding, and sadly, some of them seem to be of the mentality of 'get rid of them so they won't be our problem'- sadly these people seem to forget what that can do in the confines of a cabin at altitude.