Obviously the message still hasn't got to some people.
An Australian man's joke about a bomb in his luggage turned sour at a New Zealand airport.
The 44-year-old from Sydney faces charges of breaching the Aviation Act after his attempt at humour sparked a security alert today at Hamilton Airport, south of Auckland.
Airport staff had asked him why he had wandered away from his luggage and he told them there was a ticking bomb in one of his bags.
Realising his attempt at humour had backfired, he told the security officers that he was only joking.
Police said that the arrest was a reminder of how seriously security around airports was taken.