I’ve met and interacted with too many people with piercings/weird hair/tattoos/funky clothing who are kind, interesting, artistic, poetic, or just fun and quirky to make a snap judgment about their character. In fact, I tend to regard such people as having creative talent rather than destructive or anti-social tendencies. I am far more likely to make a character judgment based on the expression on the face of a stranger rather than the adornment of choice. Vive la difference.
(Though the OP didn’t ask my bio. I felt it relevant to the discussion.) Female/37/resident of the South with a relatively conservative habit. No piercings, no tattoos, no weird hair for myself or any of my immediate loved ones.