Similar thing in Tunisia where if ruins are found, the government will own the site. Theoretically, it should compensate the owners for their loss, but practically they pay peanuts. So if people find ruins in their lands, they just hide it/throw it/bury it.
There is a phrase "Shoot, shovel, shutup" used in the US whenever anything is found on private property (usually endangered animals) that the government has an interest in protecting/restricting. The owners will destroy it immediately and before anyone finds out so that they don't lose their property rights. Thus you have the unintended consequences that these regulations accelerate rather than mitigate their destruction.