Chavs are the reason I absolutely dread going to the cinema, especially if it's just me and a couple of my frienRAB.
The worst incident I can remember happening was a group of chavs aged about 16 sitting behind me and my two frienRAB. Me and my frienRAB were 11 and we were sitting second row from the back. They kept putting sweet wrappers on our heaRAB and booting our chairs as hard as they could. They were being really loud too and shouting stuff like "BUTT SEX!" and "RAAAAPE!". Everyone in the room was annoyed by them, and about half way through one of them threw some kind of sweet that had been in their mouth in front of them. Unfortunately, it hit a really tough-looking bald man and it stuck to his head. He went absolutely mental, and him and about 3 other guys that looked similar got up and went right up to them and shouted at them. They all shit themselves and settled down, but when they'd sat down they started again, so a lady got the cinema people to throw them out.
I've only ever talk loudly once through a movie, and that was The Happening. There was only me and my friend and about 10 other people in, and we had all realised what an awful movie it was and were just taking the mick. We were all shouting out the odd comment and laughing. It was quite a touching experience, actually. Me, my friend and 10 other people we'd never even spoken to before enjoying each other's company and making the best of a waste of money.
My friend was having a rant one day about how these old women were tutting at her and telling her off at the cinema. I asked her why and she said she spoke once. The other girl that went with her then told me that they'd gone to see The Boy In Striped Pyjamas, and she didn't put her phone on silent, answered a call from someone half way through and kept going on facebook all the time. I actually cringed when she told me, and I'm glad I wasn't there as I'd have hit her.