The correct way I think is to have clearly identified privacy policies (based on EU laws if its EU country I would suspect) what kind of information should the ISPs be required to provide in the whois and require that all /48 reassignments (but not /64s) be registered in whois but that information provided about the user (i.e. is address included or not) be based on that privacy policy.
I disagree. IP space is a public resource, much like land. Just as who owns a piece of land is public information (everywhere I know of, at least), and this is not considered privacy-intrusive, I believe that being assigned a piece of IP space should require the owner information to be public. Nobody is required to hold any IP space, after all. If privacy laws in some jurisdiction make this illegal, then IP space simply must not be assigned to entities in that jurisdiction. Having IP space is not a right. /~\ The ASCII der Mouse \ / Ribbon Campaign X Against HTML mouse@rodents.montreal.qc.ca / \ Email! 7D C8 61 52 5D E7 2D 39 4E F1 31 3E E8 B3 27 4B