John I agree on many of your points, but I also see where Justin is coming from.
If the gecko trade, or even the reptile industry was dependent on what zoo's (AZA accredited) get in then we would be in the stone age as to what and how many species are available. As zoo's for the most part don't care much for the reptile dept, as not many reptiles are what people pay to see...people want your keystone species...lions, tigers, gorillas, rhinos, etc. First of all zoo's from what I read John, you assume that zoos (again AZA accredited institutions) do everything legally. I could cite you several books (not cases, but books of cases) as to how many times zoo's are just as irresponsible and ruthless as the common smuggler/theif. I could also go on all day about reports of what zoo's (again, major institutions like the National Zoo, Seaworld, etc.) have done to no longer needed animals...ex: selling old hoofed animals (zebra, giraffes, etc.) to big game hunters in Texas.
Anyways back to Justin's point......if we ( the gecko hobby) were dependent on only confiscated animals to get new bloodlines, species, etc. Then I think we would find ourselves begging for more smugglers to get caught. I think you could argue in your reference to common law, does a police station really want all crime to vanish as then we would have a lot of cops/lawyers out of work.
I'll try to post more later..gotta get to class, but interesting debate.