Interesting. So, basically allowing both.

It is good to have open discourse, but generally with things like this, the most vocal and active people determine what is acceptable or not. Rules or not, when everyone in a community disagrees with someone, most people go somewhere else sooner or later. Unless they are a troll or evangelist or masochist.

Open discussion can work in some communities, but there has to be a mutual interesting in finding the truth. If, instead, everyone is out to promote their agenda, it does not work so well.