It just makes for a shitty experience. I grew up in a blue-collar family and still dress that way, even though I'm firmly upper-middle class now. I took my wife to a high end mall for a her birthday one year, and when we were looking at designer purses, the security in the store followed us the entire time, presumably because their typical customers don't wear jeans, tshirts, and sneakers. We noticed the security in all the stores were doing it, and eventually we just left without buying anything because we didn't like being treated like criminals because of how we dress. Even though we could easily afford to buy things there, we haven't been back to that mall since.