FWIW, to appease the cowardly-downvote brigade, I personally believe the concept of a penumbra is valid and important. But the world doesn't always bend to my will. Merely invoking the concept without considering current context is weak because it won't convince anyone of anything. If you want to make an argument based on that, you'll have to put in a bit more effort than just pasting a link.
Also, please read the guidelines about low-effort comments.
Though having the FBI and Twitter policy people being in such close communication must be eyebrow raising at least. And it a little bizarre honestly.