I think it's a good idea in general. However, how do you plan to deal with the "Snood Guy" kind of case? It was great to have the Snood Guy come and post a little, too bad some people made him run away. Would he had posted if in addition to registering he had to pay? What about Paul from Big Fish, who came to clarify a couple of issues? I think these admittedly few contributions are still valuable but are kind of "impulse post" - how do you plan to keep them?