One of the major behavioural problems that afflict society is the apparent inability of people to realise that actions have consequences. Thsi may be partly blamed on TV, where bad behaviour carries on with impunity. Here in the real world, people neverf think as far ahead as the consequences of what they do and say. rationally, you will be detained and maybe arrested if you 'joke' about bombs in airports, but there will always be some people who simply don't look ahead to what will happen if they try it. You can't rationalise this behaviour - it isn't rational, if we can educate people that freedom carries responsibility, this kind of nonsense - but don't hold your breath!