If you arrive second, you do not have the right to have anyone move over to give you the best seat, like say the middle aisle seats, unless you are handicapped in some way that makes it difficult for you to sit anywhere else.
I'm always amazed at the people who arrive late and expect people to move over from the middle aisle seats. What I do is move out to the aisle and let them pass through to the middle seats.
The best way to avoid altogether the types depicted in the film (and all distractions) on Sundays, is to sit in the first 2 rows. They never go there.