Can't agree more, the op's post is everything against a community like this. All rules are created by the community together, people can use tags however they want. Plus, I only used it for photos taken in China or china related posts.
非常赞同你的意见，楼主的贴完全是这样的社区所反对的。所有的规则是整个社区一起制定的，人们可以用他们想用的任何标签。并且，我用cn标的地方都是在中国拍的照片和中国相关的帖子。