The whole idea of the list was to get folks to try for those crazy difficult and extreme terrain caches. If this effort with the reviewers to purge the abandoned caches doesn't work, I'll just use my powers of eminent domain and remove them from the list.
I like the concept of the list and your efforts to keep it going. I think it serves a useful purpose and will continue to do so even if the reviewers don't delete the abandoned caches. If this round doesn't work (to get them deleted), going another month or two just might.