Newest Low by Facebook

When they don't want you to share your posts which were not written on their platform and do not fall in line with their owners' agenda, social media sites suppress your posts in memory holes and do not show them to your peers.

That's known, but what is recently done is absurd, with Facebook blocking posts I've tagged my friends with, whom I usually tag so they can get the notification of the posts, and marking them as Spam!

That's one of the reasons I maintain online presence on several platforms.