I doubt many of our LFS really know how their fish are collected. They're mostly buying from distributors in CA, and I'm sure they're getting fish from many collection sites. And even if they could keep track of each fish's history, you'd have to count on every collector and distributor telling the truth along the way.
I think we'd best concentrate on good husbandry and education at the LFS when deciding where to spend our money.
Nate