Perhaps I am missing something, OP, but I do not understand what you are wishing to get from this thread. You asked in your original post about what other people do concerning phones in the theatre, and you have been give commiserations, plans of actions, and other stories.
TBH, the rest of your posts seem to be a little combative to those who do not entirely agree with your points such as phones being entirely turned off, or the theatre staff's role in what happened. Were you simply looking for agreement that the gentleman was rude, despite acquiescing to your request? That movie theatres are terrible for not strictly enforcing rules over other adults? I'm somewhat confused.