Those have nothing to do with each other.
Employers are able to have dress codes and tattoos, piercings and several other things fall into those. On top of that depending on the work and piercing they are safety or health code issues. Anybody that doesn't have the sense to think how a tattoo might effect their life before they get it ends up paying for that down the line.
- - - Updated - - -
And a bunch of other junk. They are almost always in malls leaching money out of wannabee trendy kids and posers.