I am not talking about laws in any particular country, but the way things would work in practice. If you see a shop owner refuse service to a girl because of g

I am not talking about laws in any particular country, but the way things would work in practice. If you see a shop owner refuse service to a girl because of green hair, would you say "that's ok, not a protected class so she had it coming" or would you refuse to do business with that shop owner, and demand fair treatment?