The human Shield analogy applies to public figures like media types on FNC and those elected like Trump. Notice no insulting tweets by Trump on them, he has been warned.
It doesn't apply to anonymous posters as yourself.
You can post whatever you want regarding them (to extent allowed on this site).
Its not the same.
I understand that distinction you make, but I do believe Greenfield’s admonition was meant for the entire spectrum on the right, it is good advice overall expecially the “Pick the terrain you fight on. Don’t let the left pull you into the battles it wants to fight” quote. (that actually sounds REALLY good, but how often does OUR side get to pick the terrain. THEY spend a lot of time choosing and grooming the terrain.
Like you, I would HOPE that this wouldn’t even need to be openly stated to the people who count, and that those same people wouldn’t have to be told to go after the “handlers” or people using the shields. But I won’t hold my breath, unless it is Trump that does it, because very few others have shown the gumption or inclination to do so.