I get what you're saying, but honestly any newb with a CC could invade your exclusive sub-forum as much as anyone does now...
They wouldn't need a CC, just an e-mail and a registered (free) account. Running a maker's subforum gives one the privilege to edit out frivolous or troublesome posts. My name shows up in red only because I have my own subforum, so I can clean things up there if need be; I have no "moderator powers" anywhere but there.
Neither Stacy nor the SuperMods who oversee the entire forum have
ever said that anyone couldn't share their knowledge and techniques here, and/or show finished work or WIPs, regardless of membership level or expertise.
They've explained that over and over and over again. The rules just say you can't advertise or sell without the proper membership. It's really quite simple, and I think it's plenty fair.
I have no idea why that "controversy" keeps coming up, or why someone would need to be "bribed" with a free maker's membership in order to contribute.

As just one example, Kevin Cashen was "merely" a registered member here for years and years, and wrote scads of
very useful threads and replies. I for one learned a great deal from his input here and if I'm not mistaken a lot of it is still in the stickies.
There's nothing but themselves stopping anyone from contributing whatever knowledge or guidance they want here... as it should be. If dumb questions and misinformed "answers" annoy you, either reply to them with correct information or simply scroll past them.