The belt sander and the battle for privacy. A body hack
jacquesmattheij.com
jacquesmattheij.com
But mutilating your body (I know, tattoos, earrings, gages), especially a functional part of your body, strikes me as somewhat unreasonable, if not unstable, especially in an age and part of the world where the government would have no trouble otherwise figuring out who you are anyway (like, you said who you are when you presented your passport).
And as for that, wouldn't each person's efforts (assuming anyone else would do this) be unique and easily differentiated?
2. Yes, they will probably be unique but it is not likely that someone's natural prints look like your sanded prints. Also, since prints regenerate, it would be more difficult to track you through your fingerprints if the authorities have the sanded ones on file.
That said, good luck hiding from Uncle Sam :)