Distributed Trust Metrics?
"I've done some googling for systems that might work in a distributed fashion but turned up nothing. I'd happily register a key with an authority (ideally a distributed one, think supernodes rather than centralized structure) and have it verify my identity. Then, at each website participating in the trust network, I can provide my identity upon registration. As people moderate me and my comments, this feedback is applied to my profile both locally and network wide. The idea is that I may be all wet when it comes to tractors, but relatively well read on politics and technology (i.e.: my overall trustworthiness would be a 7, with a 3 on misc.rural, a 8 on slashdot.org and a 10 on poliglut.org). Now readers of my commentary have a more reasonable way of judging my trustworthiness on both a local and a global scale."
To support your very good point, I herefore post in agreement. I never thought of doing that, and I must say I would be suckered by it if it happened to me.