That's exactly my point. And it's not just headstones ... it's family photos, stories, etc.
The other side of my point is there's already so much information to filter through and it's very time consuming. These people are creating redundant entries that we all have to spend time clicking through. I've also been receiving new hints for certain ancestors ... only to find my photos are the new hints saved under another user's account. In some cases my media is not even listed in a set of results while the person who copied it does appear. Only then to find many people have linked to it via their tree.