Exactly. nostr:npub1528y9s3jg3ka6uez8xctzl9yq6ppkp6zmxe9ud6dttuv94ndrffqer2m8n has a point. In this case, hiding the SSID might be enough.
But still, Google and Microsoft will use whatever the NSA is demanding and I'm sure they track at least mac addresses of devices connected to the hidden AP