Oh, understood. There absolutely may be considerations which lead to a decision not to leave, and I've more than once sat through to the end of a movie I wasn't especially enjoying. But it is ultimately voluntary.I recall twice wanting to leave a movie well before it was finished but, in each case, I was everyone’s ride home, so I endured each movie to its bitter (to me). The first was the original Red Dawn in the 80s and the second was The Blair Witch Project (that one still owes me 81 minutes of my life).
The point I was attempting to make is that no one is ever truly trapped in a movie theater by anything other than their own choice. The door is always right there, unlocked, with required-by-statute lights guiding the way.