I came here expecting someone trying to pull a anti-privacy fast one. Nice try.

Just because an IP address alone is not enough to legally beyond doubt identify a person doesn't mean collecting IP addresses in combination with online behavior doesn't violate people's privacy.

These are two fundamentally different things. The only real way to identify someone is through things like DNA or fingerprints. Everything else is just an indication, it may not be enough to serve as evidence in court, but it's definitely personal.

The birthmark on my ass may not be unique, but it doesn't give you the right to collect pictures of it without my permission.