I've just done a 4.5 hour flight; when I boarded the plane the bloke in the seat next to me had his legs spread such that they took up literally half my seat space. Oh he'll move, I thought to myself as I sat down. Did he fuck move. So I thought I can either sit here seething for the duration of the flight and trying to make myself as small as possible, or I can call him out. So I did. His wife tittered, like I was joking. But he bloody moved his legs.
So I'm posting this to encourage others to have the difficult conversation instead of being embarrassed about claiming your own space that you've bloody well paid for!