QuickCheck: Is it illegal to say 'bomb' on an airplane?

WORDS are a powerful tool. The things that you say (and where you say it) matter more than you think they do. Words can change lives, create relationships and turn around and ground a plane full of passengers, as those on flight MH122 found out on Monday (Aug 14). While on their way to Kuala Lumpur from Sydney, Australia, a verbal altercation broke in the cabin where one of the passengers kicked up a fuss and made it seem like he was threatening to blow the plane up. This forced the captain to turn the airplane right around and return to Sydney where police on the ground immediately arrested the man. While it turned out the man was bluffing, this apparently won't protect him from the full weight of the law.

So, is it true that it is illegal to say 'bomb' on an aeroplane?