Discussion How Do You Deal with Seat Squatters on Flights?

[Duke Nukem: Dino]

I recently came across a story about a passenger who had a clever way to deal with seat squatters on a flight. It got me thinking about how common this issue is and what strategies people use to handle it. Have you ever had someone refuse to move from your assigned seat? What did you do? I'm curious to hear how others have navigated this awkward situation.