Airlines overbooking their flights, as they reckon a small % of people don't pitch for a flight. So what?! The seat has been paid for! Sure , when everyone pitches up, they may sweeten the deal by bumping you up to business class, booking you into a hotel, etc., but what about the damn inconvenience, connecting flights, commitments/arrangements/other bookings made at your destination?! How do they get away with effectively selling the same seat (product) twice?