Please Don't Buy Seats You Won't Use - Someone May Need Them Later

I have a rich friend who thought it'd be a good idea to sell out a local theater timing/Auditorium. He didn't actually execute this because I talked him down, but please don't do this. Just because not all seating is sold out yet doesn't mean there won't be people who will need tickets for that timing/Auditorium later. We're only in the preorder phase right now. If it's, like, 2 mins before the movie starts and no signs of others showing up, then I'd understand. But not while people are still buying tickets.