I think that they should spend more time empowering these guys with permits, as they did in PE. They gave the bait diggers entrepreneurship, educated them, gave them permits and only they can sell. Last I heard (It may have changed) these bait diggers were protecting their 'turf' from 'rif raff'.
What I have found is that if you interact with the nature conservation guys, most are actually motivated, good info helps, so if you have , pass it on. The cops do nothing, it's the Nature Conservation guys that act. Before visiting one destination, I called the guys and told them what was happening and that I hope that I would not be witnessing any of it. They did not know me, but I was well inspected by them. I was pleased to see their efforts. They REALLY did their job well.
Hey Lord Litho - It's never too late to make a difference, even a tiny one helps. So you feel bad about what happened, we all make mistakes, forget about it. If everyone did something small to protect our marine resources, it would not take long before we all saw a difference, so now is your chance - if you see something again, let the authorities know.