JohnCW Well, I've seen different definitions, of what levels belong to beginner etc. Some say beginner is 1-4, intermediate 5-6, and advanced 7-8. But that was not really my point. Rather that not everybody follows the ABRSM or any other specific syllabus nor thinks in those terms at all. Some may focus only on classical solo repertoire but still not within any syllabus, some are only interested in learning accompaniment with their main focus on chords and harmonisation etc. Some struggle with rhythm or phrasing but are excellent at playing the right pitches by ear, some are the opposite. Some have a very good grasp of theory but very little playing experience etc. It's impossible to place everybody on a one-dimensional scale without loosing a lot of nuance. In other words there are things to be learned from students at different "levels" which would be lost with too many walls and subfora.
But I do understand your underlying point. I did find the ABF and especially the recitals intimidating as well as poorly named when I first joined a couple of years ago. Honestly, my main reason for participating in my first recital was to lower the level a bit as it seemed unusual for first-year students to participate. But I don't think setting a hard ABRSM 3 upper limit is the answer. Many participants here are very diligent and would quickly outgrow that, and I doubt there would be enough participation to sustain such a forum. It seems a handful people have joined ABF every year but only a few stick around as regulars.
Btw, here in Sweden I couldn't take in-person instrumental exams even if I wanted to as none are offered. Therefore, I truly have no idea where to place myself on something like the abrsm scale. On the other hand everybody that went to school here has had compulsory weekly music lessons for at least nine years even if they never studied an instrument.
I agree with the suggestions above of focusing on the aspect that we are all learners. I found "Learner's lounge" an excellent suggestion.