I've been around a lot of different people in my life. And the one thing I've learned is to never judge someone based solely on their appearance. I would rather have a teacher who took an interest in what I am doing as a student with a piercing, than a teacher who was prim and proper and could give two ishts about what I am learning. I'd be so interested in how the teacher looked, I'd be paying attention to what he or she is teaching.
I think we put WAY too much emphasis on appearance. What I do with my body should not be anyone's concern so long as it doesnt' hurt anyone. If I want to pierce my tongue, so be it.
My parents are kind of conservative, and freaked a little when I got my tattoos, which are covered up, but respected my decision. My daughter wants one now, and I told her she could get one when she is 18.