HI TILL-
Social comportment: being well-groomed, discreet, well put-together, respectful of others, etc, are all part of a civilized society. Some people don't want to do that, they reject the concept, or simply don't have a clue how to dress or any sense of style.
I could buy your arguments except that you keep harping on 'style'. It sounds like a fashion magazine writer or a clothing marketer rather than a real person - as trite as the 'faux rebels' you criticize, and has little to do with a civilized society.