Since I observed that "May Crisis Pregnancy Centers provide false negative results of pregnancy tests?" has been closed by Shog9 without the participation of other members of this great community, I want to ask whether these unilateral actions done by these so-called supermods are ethically correct in general, and whether they are correct on this particular stack that has great moderators and great high-rep users who, if any, can do, as they do everyday, any activity to make this site the great and planetary site it is?
SE employees generally avoid acting as moderators on individual sites, but it happens in some situations. Typically this is triggered by the post causing some kind of trouble which draws their attention.
I don't see any problem with this, even when I disagree with their decision, the fact that they intervened at all is usually a sign that there is some issue there that needs to be solved. And the community as well as us moderators are free to override such a decision of an SE employee.