So tattooed body builder MUST be a guy, and the stranger unnerved by his presence MUST be his prospective lady friend. And you're saying that fitness nuts and ink enthusiasts and by extension here any number of other subcultures should just ASSUME they are scary, that there is no place in public where they can be permitted to relax, and you lump it in with the same social travesty that black people must assume they are frightening to white people.
... wow.
Look at it this way. When approaching people I don't know, I flip my 'how-do-I-appear-to-others' switch. I don't want people to think I'm insert adjective here so I make sure I'm aware of my behaviour and others non-verbal communication, to minimise the chances of that happening. If someone seems uncomfortable, I back away. I know I appreciate it when others offer me the same courtesy.
This isn't just about tattooed body builder guy. It's about small, white, non-tattooed girls like me too. It's about everyone being aware of how they might be making others feel and having the respect to act on it.
and do you notice her reaction? She wasn't used to it.