> On the Parenting.se, there was a similar "back it up" rule, based on the blog you referenced. The rule is part of the custom content for the site's help center:
Please note that opinions shared here should be backed up either with a reference, or experiences that happened to you personally. Also, posts that primarily exist to push a specific agenda (propaganda), and soap-boxing, are not welcome.
If we want a rule like this, I suggest placing it on our help center, which is currently nearly empty.