1) When people pronounce "jargon" like "jar gone" with the emphasis on the back half. Is this actually the correct pronunciation and I've just not known? It sounds pretentious.
2) When people in public restrooms use the paper seat covers on the toilet and then leave them there. This is basically saying, "I cannot abide to have my ass touch where you've put your ass. But I don't mind you having to touch - with your hands - the paper where I've put my ass."