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.
it's far easier and more accurate to track someone based on browser fingerprinting and a few other features than any IP address -- period. IPv6 in no way makes this worse or better than IPv4.
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.