One of the singular greatest and most important aspects of online communities is the right to anonymity.

If every poster were required to have a government ID attached to their online presence I worry that many of the people who need access to online communities the most would be unable to participate in them. I don't know what the solution would be of course, but I'm tempted to pitch the idea of a "trust worthiness" score attached to users that functions somewhat like karma. Of course currently there's no practical and certainly no bias-free way to evaluate the massive amount of information being posted daily. There's also no way to guarantee that the majority of people would trust such a system nor that they are willing to verify any of the information they consume and readily spread.