First of all, Avsim DOES have a dedicated forum. Secondly, by now the old and new users of P3d know to skip Flightsim if they want P3D info. There are several other sites that have decent P3D forums in addition to the "official" LM site. The only restrictions I have seen on these sites is that discussion of the EULA is a no-no - it's been hashed to death and there is NO ONE that has anything new to say, and posting how to install an add-on that does NOT support P3D. Other than that, there are a growing number of users who find P3d an excellent step up from FSX.
What was the liine from the movie - "Build it and they will come" - create a forum and watch it grow.
The current attitude just drives the users elsewhere.
I7 3770K @ 4.73ghz Asus Sabertooth Z77 16G G.Skill 1600 7-8-7-24 2T 2 x EVGAGTX780 SLI Corsair 1000W PSU 1TB Samsung SSD for P3D - 2 - 256G OCZ Vector SSD - HAF 942 - Corsiar H100i Liquid Cooler W7 64 Home Premium.