If you know them well enough to be sure they would'nt have a problem with it, or better yet just ask them. Most people would'nt care, but!, some people can be a little funny about stuff like that ( not ha ha funny ) It would be the polite thing to do and insure there were no hard feelings about it. And it would'nt diminish the effect and they might enjoy it. Little things are easy to ask about and can be harder to expane later.
We made a tombstone this year with Santa Claus written on it. We are planning on decorating with tinsel and putting some Xmas lights on it. I also have a Santa hat I was thinking about putting on the grave. My wife is dead set on this, I on the other hand am not for it. What do you all think? I might have to place it in a more hidden spot where adults would be more likely to see it. OR is this just too rude to display. Is this funny or just plain evil?
Frankly there are to many other names or saying that you could use. Unless of coarse you enjoy watching a parent explaining to thier child that Santa is not really buried there. How about putting you wifes name on one. Remember, Halloween is for kids too.
a bunch more I can't remember, each with a quote from one of their films.