Who owned the beach where you saw this? I own the tidelands that we live on, so if that was on my property we would kick them off. Most tidelands are owned by the state.
I don't agree with it, but the tribe has a right to dig on my property even though I own the tidelands. We are thinking about planting and starting a business on our tidelands, and if we did then I heard the tribe would get to take half of the natural harvest one time before we planted. I still need to look into it.