I have a couple of thoughts on this one:
1. Firstly, I am strongly in favour of cleaning up family graves. Here where I live, we have done two now. The sites looked very shabby and unkempt before, and now they look as though someone cares about their ancestors. Furthermore, the inscriptions give some valuable information about the people which we have incorporated into our research.
2. The cemetery is becoming increasingly popular and a local historian does tours. I know he sometimes stops at one of our graves, since gggrandmother was a prominent citizen. The inscriptions are readable now for interested members of the public, and as above, I like to have the grave looking as though someone cares (which I do!) for other people to look at.
3. When I was in England, I went looking for the only grave I believed I could find. I found it OK, but it just had a wooden style monument which was rotting away, and any inscription had long since disappeared. I was bitterly disappointed. It really IS important that when descendants come looking, they should be able to find and read their ancestors' memorials.
MarieC