Unless you mean which user added it? I fail to see what a potentially ephemeral pseudonom really tells me. Its not like you need to present a drivers license to edit wikipedia. Anyone can be anybody.

But even ignoring that, i suppose i just don't agree. Seems like one big exercise in the genetic fallacy. I want people to show their work, and have their encyclopedic writing work be evaluated on its merits. I'm mistrustful of systems that put stock in people's reputations over what they actually do.