If a movie theater or other venue has a policy of "No outside food or drink" do you comply, or do you bring your own if you don't think you'll be found out?

If you are going to the movies and they have a policy of “No outside food or drink” (meaning you can buy from the concession stand but not bring your own into the theater), do you comply if they don’t enforce their policy?

Why or why not?

This question came from this previous question and discussion: http://www.fluther.com/181913/do-you-see-movies-in-the-movie-theater-very-often-what/