Comment by jbjohns

But does this not make the assumption that the Identity being provisioned is exactly you and only you? I've always seen these identities as my pseudonym on some identity provider and use them in that manner.

I suppose I've used some identities in enough places that it would be hard to deny to certain entities that the identity was mine, but even in that case it's a small subset of entities which have seen the identity that could prove that it's me.