Groundfine
I agree with you.
Given the name of the site, it's not surprising that people who don't know the reality think that the views are expressed by people in the industry.
The difficulty would be in regulating membership. Other than giving a licence number or some other ID, I can't see how it could be done. That would mean giving up anonymity, at least to the administrators. Some might not like that.
I would favour that because the status/category of the contributor could then be clear next to his/her username.