One thing that most people are forgetting or not realizing is this was not done in a public place, it was done in a semi-public place. Either way calling the police won't get anything done because taking the picture in itself is not going to be a violation of a law, what is done with the picture may be, but that is a separate matter . However notifying the theater management may be another story, it's their property so they make the rules. If there is a no photo/video policy in effect, or if they just want to tell the person to stop, then the person with the camera has two choices, stop as requested or leave the facility. If they refuse then the theater management can have the police respond and have the individual removed and/or charged with trespass and what ever else the police deem appropriate based on the persons actions once they have responded.
While we may not like it, our pictures are being taken multiple times every day. It's a fact of life, so if you're going to leave your home you need accept that it happens and get a thicker skin and not let it bother you.
