I have been an avid muzzleloading message board surfer for a long time. Facebook is a different kind of critter, and it seems to attract a lot of newbies that are excited but virtually clueless. Back before Facebook, All of the Message Boards (like this one) were thought of in a similar vein by the old gray beards in the hobby. Those great old guys did not waste any time pushing a mouse around, but spent more time in the woods, teaching the greenhorns around a campfire.
Facebook might be a good magnet to get new interest in the hobby and also a buffer to filter the riff-raff. Just have to recognize what tool does what best, and not try to expect too much out of any of them. Neither are an adequate substitute for fresh mountain air and a crackling wood fire.
Ken