It is a notion I have been sharing for a long time. Whenever we get an influx of new members it seems like for every one or two that stick around and add something to the conversation, there are even more that head straight for the B/S/T.
Honestly it's this behavior I hate the most. I recently had a new member PM me about the two weeks rule. I responded telling him it was to prevent scamming and spammers and said it was a rule we enforced heavily. But to help pass the time, I invited him to join in the discussions. His response was to tell me to inform him when his two weeks were up, and then he left. He hasn't posted since. In fact, the last time he logged in was a day after he sent that message, which was over a week ago. I'm not going to tell him when his time is up, especially since he's refused to join in after I politely invited him to do so.
Look, if somebody joins the forum and posts mostly in the B/S/T but does come out from time to time to join in the conversation, that's fine. Maybe there's not much they feel they can add, but they add something to the community when they feel they can. But the folks who are coming here simply to sit in the B/S/T and never venture out, I see it as them just unloading their crap on us and then jetting as soon as they have money in hand. I don't see them as contributing anything, and if a deal goes south, as a moderator I have to admit that it's going to be harder for me to be unbiased towards them because I don't feel I know them at all, especially if the dispute is with an established member. And no, I'm not saying that in an attempt to drive folks away, I'd prefer they actually join in the discussions and have thoughtful conversations on a hobby we're all supposed to love so much.