It's been 37 years since the movie Midnight Express painted a grim picture for travellers pondering the thrill of breaking local laws. Turns out that when we visit a foreign land, it's their laws that hang over us; their ideas of what constitutes a crime and their ideas of what might be a reasonable punishment.
If only someone had pointed this out to Otto Warmbier. The 21-year-old American student was last week sentenced to 15 years hard labour for what seems - from where we sit in our comfortable western, liberal democracy - a pretty minor offence.
Trouble is, he was in North Korea at the time.
Warmbier was found guilty of committing "hostile acts" against the state after being caught trying to steal a propaganda banner that hung on the wall of the Yanggakdo International Hotel, in Pyongyang, where he was staying.
It would be a kind of dumb thing to do anywhere (would you steal a US flag from a hotel wall in Washington DC?), but mega-dumb in Pyongyang.