I understand your fustration and am happy you brought this up. You are Qatariu and complain about it. Good for you. We all feel the same and that is why I do not go to the cinema. I watch at home where I can put up the sound as loud as I want and if anybody wants to talk to me, I either pauze or tell them to come back later. Now my tv is not like the screen in the cinema, but a large screen is nice too.
As for the education of the Qataris in the cinema I recommend you write to the management of the cinemas or the cultural ministry that they ban the mobiles from entering the cinemas like they do for the ladies side of a wedding.
You could start a petition and I am sure many QLers will sign cos all of us are fedup with this messaging, calling practice that so many of your country men & ladies are practicing without regard for the other people.
Aisha-Taweela