"Its interesting (and transparently obvious) that it does not address the central arguments of the case against the further tolerance of artefact collecting. "

Wot, that the resource is finite and dwindling, plain and simple?
Oh contrair Mr B.

This seminal contribution to conservation theory offers a revolutionary view - that its all rotting away really fast (including the flint and pottery) so they're heroically getting bits out, uninvited, thereby saving the knowledge for us. Preservation by Shed it's called. Consequently, and I LOVE this as a supreme example of tortured logic for self-interest, it is opined that

"The emotive phrase, ‘depleting the archaeological pool’, is therefore entirely misleading, because it implies a net loss to our knowledge, as opposed to a net gain."

You can't buy tripe of that quality anywhere.