Sorry for my slow reply.
I would like to keep "old" locations on the map as a reference, for the purpose of telling people that the location they may have visited before now no longer has pins. This as opposed to not showing the location at all and people potentially adding a location "from memory" when the current situation is that it has no more games.
What's more, a location might get games back and then we can simply add them to the locations entry because it still exists and with that we'll also keep old comments, photos, bookmarks etc. for a location.
I have recently (September I think it was) added game count to the map indicator icons. A location with no more games show a 0 (zero) now.
Any other ideas how to improve are welcome!
Screenshot 2014-11-04 10.11.37.png