[benwilber0]

I'm guessing because users will just "verify" themselves, and then the whole thing is meaningless.

[preciousoo]

Users can then choose to subscribe or unsubscribe from a Trusted Verifier, if one starts to act in an unsavory manner. That a Verifier exists doesn’t mean people have to use it

[steveklabnik]

In the current system, anyone can verify anyone else.