I do confirm that i explicitly tested this with my super unused facebook account, just stating that i was testing restrictions on talking about Linux, the text was: """I don't often (or ever) post anything on Facebook, but when I do, it's to check if they really, as announced on hckrnews, are restricting discussing Linux. So here's a few links to trigger that: <a href="https://www.qubes-os.org/downloads/" rel="nofollow">https://www.qubes-os.org/downloads/</a> ... <a href="https://www.debian.org/releases/stable/" rel="nofollow">https://www.debian.org/releases/stable/</a>"""
and indeed within seconds I got the following warning: """ <i>We removed your post</i> The post may use misleading links or content to trick people to visit, or stay on, a website. """. This is one massive wow considering how much Facebook runs on Linux.