What a neat find.
We have similar stories about the joints etc in a cache. Early in our caching career while seeking GCG8D7 in Colorado we found the cache had a joint and a pipe. We took both and never mentioned them in the log.
The cache log had an entry that said (made up names here cause I forgot the real ones) "Me and Sue climbed up here to get mellow. We found your stash. Thought you might like a smoke when you are up here."
It's been said that it takes all kinds but my father was fond of saying "It doesn't reaaly take all kinds we just have got all kinds."
May those who love us, love us. And those that don't love us, may God turn their hearts; and if he doesn't turn their hearts may he turn their ankle so we may know them by their limp.... An Old Gaelic Blessing