I don't know what champing is, but I agree with all of your points. We went to see a kids movie recently, and this very heavy person sat in front of us, who had the most outrageous body odor I have ever smelled. I felt like Agent Smith in The Matrix: "It's the smell, if there is such a thing. I feel saturated by it. I can taste your stink. And every time I do I feel I have somehow been infected by it. It's repulsive, isn't it? I must get out of here."
Damn it was terrible. It got in my nose and I could smell it when I got home still. When it comes to movies, I'm like I'm the most interesting man in the world. I don't often watch movies, but when I do, I prefer to do it at home.