I'm new to geocaching, and this is such an interesting thread, I just had to add my input. My mother died 5 years ago, and to this day I still miss her and talking to her every day. This is an activity she would have loved (she was the ultimate puzzle solver). She was also viewed by most of our family as the one to go to for advice, an ear to bend, a good laugh, whatever. Her door was ALWAYS open, and her point of view was frequently quirky enough to make you laugh.
Because I've become so taken in by caching (in the short two weeks I've been at it!), and I want to somehow include her in this with me, I was seriously considering placing a cache on her gravesite. It's just the sort of thing she would have loved! Having people STILL come visit her even after her death. I can just see her smile and hear her laugh! Knowing her, I believe she would not only giggle at it, she would also be honored that people took the time to come visit her I'm glad to find that there are people who see these caches as interesting and worthwhile.