I was recently confronted with a interesting problem. My friend, while discussing the benefits of IPv6 mentioned a interesting side affect. No more tracking via IP. It would be like trying to record a dust mote in a sand storm. IPv6 will make tracking "evil doers" Much, MUCH harder due to the stated metaphor. Too many IPs, And I'm unsure a ISP would WANT to track the users of those IP's. Way too much hassle. But of course I can't be sure of that, i'm very good when it comes to TCP/IP tracking.