Thank you EusebioLeal, for that great Analysis! Sorry I didn't reply earlier, but I didn't have Internet access for a few days.
I started this whole collection for my own pleasure, but it is very encouraging, if you're getting letters of appreciation, like yours, from time to time.
I'm well aware that you cannot please everyone, and the sheer number of World Heritage sites makes the placemarks quite prominent in the community layers. This is, of course, helpful for finding and correcting errors, when addressed to right people, but, as you can see, it also seems to make quite a few people unreasonably angry.
Your reply should make a few people think, but, unfortunately, somehow I doubt it really will. Nonetheless I hope all of you will do the same thing that I'm doing when compiling this collection: