I have a better idea with regard to pointing to FB posts.
Since they don’t allow outgoing links from blog posts, then the new rule is no links going into FB. Instead, just copy the text from FB and paste it into the open web where it can be linked to. Rescue ideas from Facebook lockin.
Whatever justification you have for using FB for blogging, there is no justification for FB not letting you use the most basic feature of the web.
My problem with this is that FB posts aren’t posted on the open web, and people don’t equate posting to FB and “using FB for blogging”. People who post on FB post there to share with people whom they’ve chosen to allow to see their posts, sometimes with very specific privacy settings. Going around those choices without permission seems to be a bigger problem than the fact that people are posting to a walled garden instead of the open web.