Will get a heck of a lot easier once the people at FaceBook, Google, Apple, NSA, et all get their way with IPv6.
And please don't try to tell me more about "privacy extensions". When I swim in a see of 4.3 billion address, I'm forced to share, leaving an undeniable possibility that I could be another person. While 3.4×10^38 identifiers could be so huge I never have the same address twice, the implementation does not guarantee that. Welcome to simplified tracking of users, advocated by the people that make money on tracking you.