Maybe they cut funding to the cemetry like they are doing here in the UK for years now, as with all public services, other than that can't see how you can prevent something like this.
Had a friend who had such a fascination with cemetries that he actually broke into a crypt once.
He told me that all the corpses inside had bright orange hair and theorised that it must be a part of the encryption process [is that a word, I've got a feeling it means something else

] ie hair turning bright orange after being buried in a crypt.
Have you ever heard such nonsense in your life?