"If Michael Jackson did it, why not us?"
Dawg, MJ didn't do that by choice. Insane subtitle to choose for this thread. Far be it from me to derail, but genuinely, what in the absolute fuck? Not too much on MJ's name.
Alright, I'm good.
To get back on topic: I'd like if this were a thing but only for exotic skin tones. If you want to biomod to gold, or red, or green skin to mark yourself as a freak then why not? Alternatively being able to modify (all of) your skin with a chrome finish would be a decent cosmetic addition.
Changing skin tone to regular colors would be used to aide disguising, and it's already easy enough to hide as is, barring extreme small worlding.