I am glad someone started a post up on Historic Preservation. I think there are a lot of treasures, valuable to local, state and national history which are always in threat of destruction and disappearing.
I think some of the most vulnerable are the old, local cemeteries which, often located in the middle of nowhere, are vulnerable to the "pranks" of teenage kids.
A few years back in the next town over from where I grew up, a small rural cemetery was vandalized by two kids. In a cemetery with roughly 105 interments, the kids managed to at least knock over every single headstone. Some were broken in half and others almost smashed into oblivion (literally hundreds of small pieces). I was still a teenager in high school when it happened.
One of the notable "residents" of the cemetery was the oldest pensioner from the Revolutionary War, Lemuel Cook, who died at the age of 106 in 1866 in Clarendon, NY. His stone was knocked over and luckily little damage was done to the stone itself.
As of now most of the stones have been repaired/replaced or put back in place. I have been to plenty of cemeteries where stones have suffered obvious vandalism and they have not been repaired. Another cemetery close by to my hometown has small stones with initials in them simply piled up next to a tree because they were removed by people over the years.
I hope posting like this will bring awareness to the constant threat of vandalism and damage to our historic sites throughout the country.