It's quite right that only admins make the decisions about photographs, otherwise it becomes a free for all with members, perhaps with a grudge because some of their photographs have been deleted, trying to get other members photographs deleted. It is frustrating when your photographs are deleted, and other photographs of a lesser standard remain on the site, but many of the older photographs were taken when equipment and photo editing software wasn't as good as it is now, and they met the standards of the time. Duplicates there is perhaps a case for reporting to admins.