Answering your questions in the order in which they were posted:1). No2). Only if you live somewhere in which the locals dress much worse than you do (if in the US, a distinct possibility)3). Couldn't say - have never met you IRL and therefore have never gotten a whiff of you.4). Quite possibly, as a defense mechanism, so that the other locals don't lynch you for violation of sumptuary laws (see answer #2).