> Is there really a good reason to disturb and destroy graves and
> exploit the grave goods? Archeology does it all the time.
For investigative and scientific reasons - but not all the time. See here, for example:
Following in the footsteps of Zammit, we decided to leave undisturbed archaeological deposits and strata for future generations.
> do you draw a line at the preservation of an inscription?
If there was a compelling reason to disturb it, then fine.
In the absence of compelling reasons, it should be left alone.