I do. I've had a number of conversations about the quest for and rejection from doctors in terms of subdermal implants that went beyond the piercing aesthetic. Friends that had designed safe (so far as we could tell without the actual implementation) bioluminescent threading under the skin (best way I can describe it) - all they needed was the physician to install it. All discussions with physicians ended with either a squick factor or a fear of losing a license. Now, this was also nearly 5 years ago, so maybe things are changing as trans- and sub-dermal piercing become more wide spread. But the ethical questions that come into cosmetic surgery, sex changes, and our dear Olympic runner with the 'unfair' prosthetics are just the tip of the iceburg.
I'm actually compiling books for an academic binge on this topic. I'm sure as the weeks pass I'll have lots of things to talk about and more than just a theoretical basis for my arguments. Yay learning!