Verification services can avoid some of the "your employer will know that you signed up for an anonymous gossip/leak site" problem by: 1. determine if it reall

Verification services can avoid some of the "your employer will know that you signed up for an anonymous gossip/leak site" problem by: 1. determine if it really is $Person by using personal verification independent of employer controlled email/sms/etc then 2. verifying $Person actually is employed in such a capacity. However, the log thing is a problem. As is the problem of "how do we know the verification services aren't just lying to us about $Person's identity/credentials"?