Normally we get a slow but steady trickle of people joining the forum only to end up being spammers trying to sell stuff which is VERY unrelated to large format photography; I delete these posts and their accounts as soon as I can.
But last night it seems to have become an avalanche, and there's no way I can try to weed out the "real" registrations from the "spammer" ones that quickly.
So for now I'm not accepting new account registrations. Hopefully this is a very brief restriction until things return to normal.