Travellers were delayed nearly 24 hours and had to sleep in the terminal of Belfast airport after their flight was diverted because of an allegedly threatening passenger. The cost of the diversion was estimated at £350,000 - an Australian court made such a passenger meet some of the costs as well as fining him..

http://www.telegraph.co.uk/news/uknews/crime/11692228/Transatlantic-flight-diverted-after-passenger-kept-demanding-nuts.html
 

Read this too about Qatar Airways----'the World's 5 Star Airline' as they like blurbing causing passenger ire.

http://www.telegraph.co.uk/finance/newsbysector/transport/11515778/Police-board-Qatar-Airways-flight-after-passenger-mutiny.html