Perhaps more that the apparent “reality” of an online identity could be correlate-able with opinions expressed by the identity. I would be more interested in posts by a verified identity in a forum on political topics than in those from an unverified identity. On the other hand, in a forum about some fictional work, quality of content would be of more interest.

Problems arise when supposedly “real” identities misrepresent their actual identity, location, allegiance, etc. in a context where those things are expected to be trusted, and then abuse that trust.