Good grief, will it never end? :rolleyes:
Cinemas don’t want you to bring in your own snacks because they want to make money on their own concessions. One is not required to abide by that rule if one can get away with breaking it, considering the fact that they allow snacking at all in the theater. The only thing the theater is legally, morally, or ethically entitled to require is that you pay for your ticket to see the movie.
Now they do have the right to exclude you if they catch you carrying in outside snacks or drinks. But if attempting to “sneak in” that way consitutes sin, then anyone who did nothing else wrong would probably qualify for sainthood.
None of this, of course, applies to true contraband such as alcoholic beverages. And in the old days, it was normal to leave all one’s garbage under the seat for the crew to clean up. Nowadays we take our trash out with us, and to fail to do so is in my opinion a greater offense (let’s not even talk sin here) than to walk in with a package of M&Ms in my coat pocket.