My point was that tattoos carry a message about the owner. Everyone else gets to interpret that message however they will. The person with the tattoo is not in control of how that message is received, even if received wrongly. That's the price of this sort of communication. One of the powers of symbols and art is that it can mean different things at different times to different people.
Businesses must control the messages they send to their customers. If an employee can't communicate the way the business needs to, then that employee is not going to work out there.