In a way, is this surprising to anyone? Can anyone remember the last time that Scott posted anything here (though I have seen him lurking from time to time)? Charlie? Any other member of the band?
I, for one, think that if this is true, then it's petty. It's akin to Prince shutting down all the fansites nearly a decade ago because he wanted his website to be the sole source for news. He still hasn't recovered from that (among his many major p.r. and career flubs).
There are a lot of cool people on this board (as well as the occasional troll) who, despite our differences and views on Anthrax, are true fans of the band. Shutting down this message board would, IMO, be just another nail in the coffin.
So much for what they sang about on "Startin' Up A Posse".