There are a couple of posts by a You Tuber (I forget his name) who reviews films in america, basically he says that the magical experience of cinema going is being ruined by thoughtless people, people using i-phones with the screens turned to full brightness, people talking out loud to each other with no regard for anyone else, basically being idiots and treating the cinema as if it was their own living room, which if true is a great shame.
P.S. Would just like to share something that happened once, my parents had taken me to see the film "Old Yella", at the end of the film when the boy is forced to shoot his dog because it has rabis, just after he shoots it a quivering voice of a young child which sounded on the verge of tears piped up and said " that boy is naughty ", not sure if anyone laughed or not, I think a few did, but the reason I heard it was because the cinema was so quite!!!