I don't have much sympathy with this whinge at all.
Traditionally cinemas have always sold drinks, popcorn, ice-cream, so some rustling and slurping is to be expected (not like in theatres which don't sell popcorn, for example), especially with mega size as it really takes up the whole film to eat it! We always get popcorn and a drink, that's part of the fun of going altogether to the movies, especially to see a noisy action film or a children's film.
People have always chatted a bit during the trailers, they tell you specifically in the ads now to stop talking and stop texting when the main film comes on, and the films are exceptionally loud as well, so the whole experience is full on, if you want quiet and silence, cinemas are not for you.
Finally, people shouting out, for goodness sake, sometimes when you go out in public and sit with the public, they'll be people who make involuntary noises or a tiny bit inappropriate, suck it up! Why shouldn't they go and see Rogue One or whatever and really enjoy it. I go with someone who laughs too loud due to their brain cancer, I'm not giving up going out with them when if it matters so terribly much to you that someone doesn't laugh loudly you can stay home/get the DVD/wait til it's on Netflix/Amazon, which is extremely quickly these days.
The cinema is a social event and it's more popular than ever, so if you don't like it, stay home or host a 'fun' silent event round your own house where you can scowl at each other if anyone goes to the loo half way through or eats a crisp.