There are many people debating this "digging" thing and I think it's good. However, while we are debating, construction crews are tearing up archaeologically important sites every day without documenting anything. Not a peep.
So, my take on this is that the more we know the better. Our laws of private property ownership allow us to keep what we find on our land, unless it is human remains or belongs to the city or government (very simplified for our discussion). Therefore, I think it's a good thing we are seeing these artifacts and that they are being preserved, studied, and reproduced.
There are many sites that are being studied that do not have the funds to proceed quickly and/or thoroughly. I think we should concentrate our efforts at improving existing scholarly digs without infringing on private property rights, IMO.
Oh yeah, and one more thing, improving existing scholarly digs means improving access to the information without having to pay hundreds of dollars for the data (books for profit) years after it was collected or discovered. At the present time, "private diggers" are a lot more generous with their discoveries than the "professionals".
OK, that's it.