Many theaters I've been to in the US stopped enforcing the "no outside food" thing. Last time I went to the movies there were dudes walking in with Chipotle or sub sandwiches and no one cared.
Because who the fuck is going to start a fight with someone that's already proven they're an asshole, for $7 an hour, to protect profits they'll never see any part of?
I go to the Dollarama just down the road, but the candy/chocolate is already getting to expensive. Would be cheaper going to the grocery store and grabbing a bag of chips.
In the larger sense, yes the owners tend to exhibit the behaviour that of an asshole.
In the context of what the previous commenter was saying, however, the employees would have to confront the individuals bringing in the food, and for what they are paid, they might rather not bother dealing with a potentially unruly patron. The patron in this case, should they exhibit such unruly behaviour (though still less ashole-ish than the owners), still exhibit asshole-ish characteristics, relative to the poor minimum wage employee who's just trying to do their job.
Well, both I guess, but I was specifically talking about anyone fronting a "try and stop me" attitude by not even trying to sneak it in. They're not going to sympathize with a low-level employee just trying to keep their job, they're going to be a loud fuck head about it.