I think this would be supremely useful in a number of ways. Firstly, I'll explain my idea. Basically, just as there is "silver member, gold member, senior member" etc. below our usernames, I was thinking there should be a place where you can select what type of member you are here. I know you can put something along those lines in your profile, but nobody ever looks at profiles. Just off the top of my head, perhaps:
Piano Enthusiast
Student Pianist
Amateur Pianist
Piano Teacher
Amateur Composer
And then "Expert Contributor", which would encompass professional pianists, professional composers, professional musicologists, theorists and music historians, as well as people who have a strong track record of basically knowing their stuff in whatever their field of expertise is. You could make "Expert Contributor" a moderator-approval based thing; require verifiable evidence of expertise, such as but not limited to recordings, compositions, or a verifiable example of expertise. Maybe require a minimum post amount: 100, 250, 500, not really sure. As I said, I think this has more than just the implication of people "knowing who to listen to", so to speak. I think anyone with an "Expert Contributor" badge would feel compelled to be especially helpful/civil, and it would make this place look a bit less... well, a bit less like it's just a bunch of non-serious people, if you know what I mean.
Just an idea.