This is the guy who created reddit, by default he can do anything physically possible. The only way he wouldn't have this functionality is if one of his employe

This is the guy who created reddit, by default he can do anything physically possible. The only way he wouldn't have this functionality is if one of his employees specifically added something to block him from being able to do it, and this addition could not be reversed. And there are many very legitimate reasons to have the capability to modify entries in a database, but honestly even if there weren't, making a system where it's impossible for anyone other than the originating user to modify an entry is a challenging task.