It is rude to block the view of others.
Jason is very tall and is at a baseball game sitting in front of other people.
Jason wants to watch the baseball game.
Jason stays seated throughout the game containing his urge to get up.
Jason stands up for a lot of the game because he's excited about the play.
The people behind Jason can see the game fine and enjoy themselves.
The people sitting behind Jason can't see over him, and they complain that they can't enjoy the game.