[Cressi]

The problem is, you will rarely find an active, high quality first timer. We have to filter throughout all the bad members before we get lucky enough to have 1 good member.

Very true, like needles in haystacks.

If the gates are closed again, not only the Low-quality members will be scared off; the High-quality will be too. So there's not really any way of separating the two before they register.