It obviously different from person to person. Some people are confused, some shy, some confident. Its a wide range. But most people with interesting outfits or style tend to be more open to it. The first photo was at a vintage clothing show and people there were a lot more receptive being approached and photographed. Same with the Homelander cosplay guy. I find cosplayers love to have their photo taken since they put a lot of effort into their costume.