> If you could verify identities well enough, this would create a platform where everyone is saying everything knowing it's traced to their identity.

Facebook and Google Plus (along with research focused on them and other Internet forums that demand one's Real Name or legal identity) have demonstrated that -at best- you get the same low-quality commentary as you do from pseudonymous or anonymous forums. The typical case is that discussion quality goes down as clever and thoughtful folks who aren't interested in setting themselves up to be the target of future witch hunts by expressing potentially-controversial opinions tied to their Real Name leave those forums for less restrictive ones.

Stupid people who are going to spew bilge do it regardless of whether their Real Name is attached to what they say. There are better ways to promote high discussion quality than to demand attachment of one's Real Name to one's forum account.