Experience level ?

[rikardo1979]

looks like an good idea but I see it unpractical and the reason is that to make it right you would have to have one person or group who scores everyone. Cos when user do it self than, he might actually feel like he is 3 or 4 where @mk01 or someone else who starts asking the questions would say he is not even 2 with the knowledge. Hope you see my point of view
This would be highly individual and actually may not be a good pointer.