It's common to assume the masses are dumb and hiding moderation can make people do the right thing without being influenced by it. For example I imagine if the pin icon was visible there would be comments about it on every story it'd be used in, which you may want to avoid to focus on the topics at hand. With that put I think transparency beats this and a transparent system is more trustworthy and better understood by the users. Just 2c but keep doing the good work.