Yeah, but imagine a built in alias manager specifically for this purpose that creates a throwaway subscription user with 1 click and lets you throw it away or silence it whenever you want.
Discussion
And no simplelogin account or any account whatsoever.
Yes, something like an HD priv key generation.
Interesting, I imagined that a client would listen for notes on these other pubkeys though, we can't be having gaps like we do for bitcoin wallets, it would be wasteful.
I think it is simpler to just randomly generate npubs so we don't have to detect reuse and we should put the npubs in a private list so the client can be direct about what notes it is searching for.
Also when searching, it shouldn't batch because that would be a privacy issue but conversely, you only leak this to your relays so maybe it isn't so bad.