[Kaslin]

Passengers: was there anyone on board that someone needed to get rid of? How about a passenger who loaded his luggage, then missed the flight?

Do you mean a passenger who had his luggage loaded on the plane, or loaded his carry-on luggage and went of the plane again for some reason and missed the plane?

[ZOOKER]

I was thinking of the Lockerbie 747. IIRC, a passenger's luggage was loaded into the cargo compartment, but the passenger did not board. The plane left anyway and exploded over Scotland. It was theorized that a bomb was in the missing passenger's luggage.

Don't know how accurate this info is, whether that was the real cause of the disaster, or whether rules were changed because of it.