People join and leave forums all the time, so what? What were we all supposed to do, acknowledge this persons great genius after one post? They seem a little flighty to me.
People don't respond to my posts either, but so what? I learn, I contribute what I can, and that's it. I don't think people here are unfriendly or unhelpful, but they are sure are snobby. It's like being back in high school, you have to be a part of their little 'clay clique" before they will grace your post with a reply.
I keep reading how friendly they are here, I wonder when I will see evidence of that?
Strange, but I have never felt ignored or treated snobby or unfriendly here. I really don't have a thick skin or am over tolerant, really quite insecure, so I find it difficult to believe that you feel that there is an unfriendly stuck up attitude here. Stick around, it is worth staying for since as you say you learn an immense amount from the post of so many others here.