I'd only be afraid if he gave me reason to be afraid. Tattoos, makeup, clothing, putting on attitude are sometimes used as a line of defense. The person inside is what matters.
The first time a met a friend of my son's, I see a young man with a gazillion piercings, tattoos, grunge clothing...he opens his mouth and exhibits the best manners and demeanor of any of my son's friends. Hilarious!