[z131]

I'm with the parent commenter. I actually deleted my Facebook, but would love to utilize this service to create a public trust profile. I just can't involve social media accounts.

[somerandomness]

What other accounts would you be comfortable associating with this trust profile? Would you hook up your GitHub?

[drdaeman]

I'd hook up my PGP key. Or X.509 certificate. Or old good username and password pair. Something I can truly own and handle. Why do I need some third party to have an identity?

Then I'd enlist accounts with any imaginable third parties (email addresses, Facebook, VKontakte, Google+, BitCoin addresses, GitHub, BitBucket, StackOverflow and so on and so on) as something I have at the moment.