A Letter to Cinema-goers:
Shine & Shame them
Bring along a torch light everytime you watch a movie at the cinema. When you hear a fella talking on the phone when the movie has started, shine your torch light at him/her.
(ushers in cinema usually carry torch lights...that fella would think it's from an usher...or many usherS...)
A Letter to Cinema Operator:
This will be another ideal notice on the screen before a movie start:
"The movie is about to begin, get ready your torch light"
Cheers.