While watching the Minion movie, there was a mum towards the front of the cinema on Facebook on her phone for most of the movie. Her screen was shining in my eyes for much of the movie. Because I was there alone with dd I couldn't really go down and ask her to put the phone away or go out and get a staff member, unless I was prepared to uproot dd and our drinks etc.
If you are ever bored in a kid movie, and feel tempted to look at your phone.... Please don't.