Got it wrong AGAIN!!! (Possible partial spoilers but none serious)
Supposedly, one remedy was to dig up the bodies of whose graves were desecrated, and re-bury them. But there are two things here that most people don't realize that makes its way into almost every graveyard flick.
First of all, digging a grave, especially an old and non-fresh one, would require many hours of work and could not possibly be completed by 1 person, then filled back up and reburried, in one night. Under the right conditions it would take about twelve hours (without breaks) for a physically fit person to dig or exhume one grave -- and it's quite a work-out, not a job for playboys, yuppies, or other tyros.
Secondly, you don't hit a wooden box.
Graves require vaults (and have for some time) in the ground -- so even if you did get to the vault, it would take special equipment to remove the concrete, metal, or stone lid of the vault to get to the casket.
If a box had been burried in the earth for umpteen years, it wouldn't still be intact covered with six feet of earth. It would be very rotted and returned to earth.
And 'cause' never was the reason for the evening,
--Or the Tropic of Sir Galahad.