Okay, foreign country is different matter. I've only done it here or in Germany or Poland which don't really count as foreign for us.
But I still don't get the 'can't leave children alone in a room' thing. Dd1 and ds are currently on the loose somewhere in the house, probably in dd1's bedroom two floors up. I'm cooking supper with the extractor and the radio on, so theoretically they could be doing all sorts of lethal things without me knowing it: dd1 could be in my study impaling her fingers on my sewing machine, ds could have sneaked down to the cellar for all I know, and have managed to start the motor on my dad's old chainsaw. The baby is tucked up alone in her cot, but could have sicked up her supper and choked.
I really don't see how that is more dangerous than leaving two children, bathed fed and teeth brushed, tucked up with their story books in a hotel room for an hour and a half while we eat downstairs, assuming they know where we are and how to reach us. I think this fear of leaving children is an Anglo/american thing -- maybe I don't understand it because I grew up in Germany, where it's considered perfectly reasonable for 5-year olds to walk to and from Kindergarten by themselves, or to leave a baby asleep in its cot while you go 5 mins down the road to buy some milk.
But surely in the end the children who will be really at risk as teenagers are the ones who have never been allowed to take even the smallest risk by themselves? Dd1 knows that her considerable privileges and freedom come from the fact that I trust her to use them sensibly; if I caught her doing something that was clearly daft, I would reconsider, and she knows that.