Went to see Serenity today and this bunch of teenagers come in talk loudly during the adverts (meh) Talk loudly during the trailers (blood pressure rising) and then proceed to actually talk during the movie.
I managed about 2 minutes before I finally turned to them and told them to shut the up rather loudly (I believe my exact words were "For f###'s sake will you please just shut the f### up!" - Just the right level of latent psychopathy in that I think

Quite frankly people like that really need to die. There's no excuse for it. If you want to talk don't go see a film.