Your biggest issue is the thread title. You're a photographer, you should understand that the first glance someone gives something leaves the strongest impression. You named this 'inner circle', with all its elitist connotations. People aren't getting past that. No matter how much you try to explain it they're not. It's like having to explain a photograph to someone, they've already made up their mind 90% at first glance, it's how people work.
I'm not saying your idea is bad or good. I'm saying this is why you're getting all the crap you're getting. because the initial impression is elitist, and you get to pick the elite. I understand that's not what you intended, but this is just like when a photographer doesn't intend for his viewers to see the photo the way they do. The photographer can blame the viewers for not seeing his vision, or he can blame himself for not executing what he wanted to get across.
That was my biggest issue with this! The way the initial post was phrased was very elitist... and I found that offensive (whether I was invited or not!).
I am calling it the Inner Circle because I am only willing to add reputable and trustworthy posters who have ample postings and which I have interacted with before. In other words, people who have earned a spot in the Inner Circle.
Oh woe to all the unwashed masses that won't be included in this photographic secret society!

Sounds like some deep-rooted adequacy issues ( meant as a joke by the way, not maliciously ). Inner Circle is a long used term referring to ones closest friends and confidants. I think that this is a very fitting description of what was trying to be achieved. ( Also the reason why google even USES circles as the descriptive device for their groups ) We can argue about this all day long, but the fact of the matter is, you know as well I do, the most active posters on this forum. Its not some mystery. In fact, a few of the naysayers that have posted here would fit the bill. The main reason for having to have a knowledge of someone, as stated, was for security reasons. It also acts as a bit of a cut-off so that we are not simply taking the entire list of members of this forum and starting a massive circle with all of the excess fat that shows up on these forums in the form of useless, negetive and downright malicious posts. This has nothing to do with whether someone is a beginner or not a beginner. Unfortunately, there is no other way for me, or the other members of the circle to guage you as a person unless we go off of historical experience on the TPF. Thats just the blatant reality of it. We can argue about people being offended or having their feelings hurt or whatever, but its really not that difficult to see this in a realistic manner.