Agree with everything @Bluefreedom says. Personally, I walk my cart to the rack because, in addition to considering it the right thing to do, I like to treat myself to the extra bit of exercise. I’ve also like to give my food servers as much help as possible by keeping my table mess to a minimum and throwing away trash.
As for movie theaters, I’ve long-since given up hope of being able to have an enjoyable movie-watching experience in an audience. People nowadays have no compunction whatsoever about talking loudly throughout the movie, using their phones, rattling candy wrappers, and leaving trash around their seats, behaving as they do in front of their TVs and totally unmindful of others, I’ve been a huge movie lover all my life, but sad to say, I rarely go to them anymore, and when I do, I pick off-times to avoid large audiences.
End of soapbox.