Well in my personal, and completely unprofessional (so don't blame me if you have an IPv6 addy, download something and find federal agents on your doorstep), opinion: I don't see how an IPv6 address would be any easier to trace than an IPv4 address. Unless of course with IPv6 they come up with a way to assign everyone their own personal address (a cyber social security number typer thing) in which case, I suppose they could sure trace that thing back to you in a hurry...
Ah that clear it up.That is exactly the point. The IPV6 address is 128 bit vs. 32 bit IPV4. So, there'll be billions upon billions of addresses available. Every device would have it's unique IPV6 address arguably making less wiggle room we now enjoy behind wireless NAT devices when it comes to court cases.