Anyone who has ever flown in the cheap seats on a airplane knows how annoying it is when the person in front decides to recline their seat so much it invades your personal space.

The answer to this problem is the Knee Defender, which stops people from reclining their seats. Unfortunately, some people don’t take kindly to having their personal freedoms stripped away.

A flight was recently forced to land earlier than scheduled due to an altercation between two passengers. The alleged cause of this argument? Knee Defender.

A male passenger had used Knee Defender to prevent the female passenger in from from reclining her chair. When she discovered this she threw water in his face.

There is an easy answer to this dilemma: we all need to have respect for each other and be courteous when reclining our seats on airplanes. Unfortunately, that seems to be easier said than done.