[SunkenCiv]

Relevant — they had a responsibility to know what they were doing. It must have been no joke busting up those stones, give or take hauling them away.

[Harmless Teddy Bear]

They did know what they were doing. They were doing what the owners told them to do.

That the owners clearly did not bother to tell them to leave that area alone or put up anything that would signal to them that the site was not to be disturbed is a pretty good indication that the owners did not care and that the site really was of little or no importance to them.

That no one else twigged to the fact they were destroying something important also points to the fact that really it was not that important.

It was not like they stepped on a vase. Getting rid of this thing was a major undertaking. Took at least a couple of days if not longer.

And they were not doing it in secret. This was quite a public place.