Right, wrong, or indifferent it’s a free country, you can choose to do whatever you want, but you can never escape the consequences of those decisions.
I would also say it’s not just purple hair, gages in the ears, a hog ring in the nose, etc., poor grammar, poor social skills, and other non-appearance factors will also cause people to dismiss individuals. I will admit I’ve said more times than I care to remember made it known, I don’t trust people with a week handshake. After teaching my kids to be polite and say please and thank you, it was one of the first social skills I taught them, how to shake hands, and to never trust anyone that gives you a limp fish. Other tools like looking people in the eye when you’re talking to them, speaking up, being clear and concise, many of these skills are being lost as our society moves to less personal forms of interaction.