In germany the taxi driver cannot actually ask you to leave. They have a transport duty (Beförderungspflicht, PBefG) by law unless 1) you can't pay or they wou

In germany the taxi driver cannot actually ask you to leave. They have a transport duty (Beförderungspflicht, PBefG) by law unless 1) you can't pay or they would have to drive longer than allowed by law, 2) they can't transport you to the destination in a taxi or 3) some higher cause prevents transport (snow storm, traffic jam, etc.). To my knowledge, airlines do fall under that and a german airline cannot legally kick you out of a flight unless any of the conditions above are met.