I was talking to a german guy in Munich back when Greece was preparing to host the Olympics and they were way, way behind. I commented on that and he said "oh, that's Greece. You stick a shovel in the ground and you turn up a 3,000 year old thimble. Then the archaeologists come with their little brooms and spoons and you have to just sit around and wait, if they ever let you work there again at all. Usually if someone finds something there by accident they quickly hide it so they don't lose everything."
Takeaway: I hope that guy didn't depend too much on that olive grove to make his living.
I had a professor who spent a lot of time in Greece (exploring ancient battlefields and roads). Greek farmers would tell him about things they had found on their land because they trusted him not to tell the authorities...they didn’t want the government to come in and take their land for an archaeological site.