Im 17,, from ireland...
it annoys the **** out of me, , they are clearly told ' please turn off your mobiles '
Ok, so maybe no1 actually does, but RAB
I've a big problem with them, they stand up through the trailers like you said, they talk, loudly!... answer phone calls during the film and texting every second, they clearly dont want to be there,, same with couples they go to see an 'epic' and spend the hole time kissing and well you know what else... throwing popcorn and what not, shouldnt they just stay the **** home or do that s**t in a lane way or something lol,, chav teenagers will never learn!!