Came across these marketing tips from Seth Godin, and I've been thinking about one of them for a week:
Choose your customers. Fire the ones that hurt your ability to deliver the right story to the others.
Actually, I think it works the opposite way on blogs. Our customers chose us, and the unhappy ones end up by leaving--in effect, firing us. But many of the unhappy ones send us comments. The question is whether, in responding to their suggestions, we're addressing a constituency that's no longer there.