by Spike » Mon Feb 27, 2012 1:31 pm
many ipv6 addresses contain the user's mac address. particuarly auto-configured ones. its part of ietf rfcs and everything. anyone on your lan will know your mac anyway, including coffee shops and other wifi connections.
there's no real technical harm in others knowing your mac address, certainly no more harm than them knowing your email address.
windows ignores the rfcs and doesn't generate standard ipv6 autoconf addresses, but like I say, its for tracking/social reasons rather than technical reasons.
.