https://www.hurriyetdailynews.com/2-500-year-old-aphrodite-t...
Before clicking the link I didn't realize what this sentence actually meant. I think I do not have the skills to figure out why these stones are important. Makes you appreciate the works of actual photographers though so that's nice
However, I've been on ancient digs where we declined to release pictures of the interesting bits due to ethical concerns, generally photos of graves or remains. It's also common if the photo would leak the location of a sensitive site, or violate someone's privacy. You're free to disagree with those standards, but they're widely-held enough that violating them will prevent publication and earn you a bad reputation.
Calculating where something is from light and shadows, is not that difficult. If you're trying to protect the location of a dig, it is usually safer to not release any photos at all.
For example, last year's desert monolith didn't have its location shared on purpose, but with a little footage it took the public all of two days to locate it, by working out which flight path the helicopter took.
Images leak location information.
In a more pragmatic sense, trying to draw a line at some finite number of years always turns up an edge case like Kennewick man where someone genuinely cares about a 9k year old skeleton. Adopting the conservative approach of "extend the same respect to everyone, regardless of age" is both the simplest and the legally safest ethical system.
The treasure hunter bit is going to be difficult to avoid if there are many photos.