They would have to link it using data that is NOT publicly available, and that is what seems to be their issue is that they can only use publicly available to m

They would have to link it using data that is NOT publicly available, and that is what seems to be their issue is that they can only use publicly available to machine link stuff together, data I've put out there for everyone to see under specific names/email addresses on purpose in a controlled manner. While yes I agree the possibility is there, it is really remote.