I love finding cemetery caches, especially in small, or old sections of the cemetery. I have only placed one cache but it is in the cemetery behind my complex in a section devoted to children. I placed it (well off to the side) there specifically because as I was roaming around looking at headstones I noticed this section was lacking in maitanence and could use the TLC of visitors. I make it a personal point to clear overgrown grass and brush dirt off the stones whenever I check on the cache. Personally, I think it is important to remember those who have gone before us, regardless of age, and to pay respects regardless of relationship. While it isnt everyones taste, I think if a cache is placed with respect, and treated with respect then there should be nothing wrong with it.
Thats just my two cents worth at least.
~Laura