Is it worth the risk?
I'm headed for Africa the day I leave the U.K, and was going to leave my laptop with a friend, then run out of the airport when I get back (I have a five-hour layover at Heathrow before leaving for LAX), pick it up and run back in.
My parents and travel agent are now strongly suggesting I do NOT leave the airport at all, but ship my laptop heavily insured overnight FedEx before I leave, so I know it's arrived safe and sound, and don't have to worry about the possibility of delayed flights, etc. when we're coming back from Africa.
Which is better?