It's funny how easy it is, to track people on Nostr.

- Images like avatars can come from virtually anywhere

- Videos on YouTube and so on

all that, without actually "interacting" with the Nostr protocol, or indexing Nostr posts (which reveal much less Metadata themselves).

So much like you could embed a tracker on your website, or email, your profile avatar could keep track of, how many times your profile has been viewed (and by whom, where). Yes, VPNs but metadata fingerprints are quite unique, even behind a random VPN IP.