> They could find a piece of brick (or put one there)

So the claim here seems to be: A university archeologist may decide to place a (modern) brick in your backyard, which they will use to support their claim that it's an archeological site, so that they can have the opportunity to waste thousands of combined hours of work and a million dollars of their undersized budget digging up a site that they don't actually think has any artifacts of interest. To which I say:

What?