They are CHIPS, not tracking devices!
It's not much unlike the Medi-alert bracelets worn now by thousands upon thousands of people in Aust, milliona all over the world wear similar, for fear of not being able to speak up for themselves, their medical information is there for hospitals to access for those peoples benefits, perhaps saving many lives where they may not have been saved through ignorance of medical staff of underlying ailments and conditions which would have otherwise not been known.
Naw, bring it on,. I have nothing to hide, and we can only benefit from this technology. If my alzheimers-stricken father in law had had one, we would have been so much less worried about him becoming lost, because a chip, implanted, would have yielded the information required to bring him home. That's only ONE fo millions of applications it could be used. ............And there are those who would object????