Sadly, just not wise enough to appreciate, or even care about, the implications of their actions.
Greedy philistines like that can quite easily cause a knee jerk reaction; calling for the introduction of regulation and licensing.
Would that be a bad thing, aside from the practicalities of implementation ? Bit like a fishing license, I suppose.
Judging by the amount of finds popping up here there and everywhere, there must be quite a little flock to fleece.