And if you manage to sneak off without anyone noticing, you will make a lot of other passengers deeply unhappy when they get to spend quality time on the ground waiting for the situation to be resolved.

Speaking of which: any idea how there can ever be more passengers on a plane than indicated on the manifest? My SN flight to LHR last week spent an hour looking for a supernumerary passenger, almost to the point of getting everyone to dig out their boarding passes. No announcement about what actually happened though. Only lukewarm apologies for the inconvenience.