Earlier quoted context omitted.
> At the end of the day, TCP/IP is inherently a non-anonymous protocol, as fundamentally as your home address is known to the mail system Yes. And the irony is that the German "privacy purists" use the non-private system of having your actual name in post boxes instead of apartment numbers It would be so funny if they shot themselves in the foot with it, but it's not going to happen unfortunately
An address is already PII, whether you pseudonymize it with apartment numbers or not. Also I think in practice the bigger concern with IPs is that the IP itself is PII at the time you collect it, so you're always processing PII even if the hash or other such "anonymized" data you store may end up not technically being PII if there's no way to correlate it to an actual person after the fact (which wouldn't be the case…
The full address is PII. But a street level address isn't necessarily, if it points to an appt block.
The problem with the mail boxes is that you're leaking that a "Mr. Smith" is living at that address. Now with Mr. Smith this is not such a big problem but if you're looking for "Mr. LessUnique" then it is