Try parking a motorbike (or quite a few cars, apparently) with an alarm/immobiliser at Schiphol. The bike park is very close to the main ATC comms antennas. Now, being a bike, the alarm/immobiliser will generally cut in about 30 seconds after you kill the ignition, so that bit's fine. It's when you come back and try to de-immobilise it that the fun starts. Better learn your override sequence and how to use it!
Not much fun at 1AM on a December morning, when it's -9C and you need petrol, so have to do it all again on the forecourt a couple of hundred yards away.