Oh the irony of what I wrote over 11 years ago back in 2003 now rearing its ugly head: 

United flight diverts over 'Knee Defender' fight

On Sunday, a fight between two passengers over personal space, a thrown cup of water and the use of a controversial plastic gadget that prevents airline seats from reclining caused United Airlines Flight 1462 from Newark, N.J., to Denver to divert to Chicago's O'Hare International Airport, the AP reports.

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Interestingly, United had banned the devices in 2004.