I started university a couple of weeks ago. Getting from lecture to lecture obviously involves a lot of walking in places where there are lots of people. For the first week or so of university, I deliberately tried to 'project confidence' when walking, but people (especially other guys) would target me and make stupid comments. Girls (and only girls) would laugh when I went past, which was odd. I ignored them all. By the way, these are complete strangers I'm talking about -- never spoken a word to them but obviously they know me by sight.
Then when I stopped trying so hard to look confident, everyone took less notice of me and the smart-alec comments stopped. I'm guessing this has got something to do with NTs being able to detect when you're putting some amount of effort into something.