How to post anonymously on Facebook Follow
While Facebook does not make it easy to post anonymously, there are a few ways to subvert the structure of this profile-based platform, if you’re willing to get tricky.
Some Facebook Groups do allow “Anonymous Posts” within the group page. If an admin has enabled the option, you can compose a post that will be hidden from group members and other readers (with the exception of admins and moderators who can still see your username).
You can also limit the visibility of your posts by changing your custom privacy settings. Select “Only Me” or create a list of friends and followers whom you trust. While it’s not anonymous, it does prevent your post from being viewed by the wider public.
Alternatively, you can create a fake Facebook page to post without your true identity being visible.