I don't think people should be denied jobs because they have a few extra holes in their face.
When I started teaching at the college, I removed my tongue piercing because I thought it would make me look more "professional." I should never have been conditioned to think that way.
Employers are concerned about their customer's reaction to their employees. Some customers are turned off by things such as tattoos, piercings, funky haircuts, disheveled appearance and bad hygiene.
Your appearance and how you present yourself is a reflection of the company you are working for.