Ive worked in a cinema for the past five years, a UCI/Odeon. Even though there are signs, it is often the case that we dont mind people bringing stuff into the cinema. The only thing that we do take from people is take away food. Would you really like to be sat enxt to someone eating a curry, KFC or MacDonalRAB? No, dont think you would. Believe me we aint doing it for the fun, we get enough abuse and threats from customers without that!