I use vpn too BUT let's face it the majority of users who wouldn't bother understand what an IP is. so...can we locate which relay is the leak from?

LONG POST Addressing Everything (TLDR AT THE BOTTOM) The problem is that this is HUGE PII. Imagine that everything you post is linked to a location that is almost where you live. Like c'mon imagine being in a surveillence state. That state knows you're using Nostr, but not what you post. They can...

Yes, but it does reveal much information in several cases. I have a fixed one for one. But in smaller countries like mine, and not being with the two large ISPs narrows your identity down a lot already

And your IP is your identity to governments BTW

Doesn't your ISP know which account has which IP ? And so they directly link it to a person?