In this case I think the fellow should be allowed to speak on the topic he studied.

I agree generally in the end you'd have to trust the forum admins to publish some rules and follow them, but that's already the case in any forum. I'm sure some people would like it and some would hate it. It's at least an interesting alternative to the majority of people not knowing what they are talking about but confidently posting as if they do, even if it's just one of the kinds of forums in the mix in the world.