For the moment, at least, employers are still mostly free to decide whether or not to employ persons with body modifications not in line with their desired corporate image. At least, kind of free:
“There is a lot of employee activism,” said Laurel A. Van Buskirk, a New Hampshire lawyer who has written extensively about body modification and the law. “And because the cost of defending these cases is quite big, it makes employers a little uncomfortable when they start delving into that sphere.”
(Guy Trebay, “Tattoos Gain Even More Visibility”, New York Times, Sept. 25). Earlier here, here, here, etc.