Not exactly a zucc, but a near-zucc. An article on Daniel Dennett's death seems to go against Community Standards for Violent and Graphic Content:
"We moved one of your posts lower in
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Daniel Dennett, fiery atheist philosopher who saw human brains as 'programmes' - obituary
What happened
Our technology showed that this post looks like
others that go against our Community Standards
for Violent and Graphic Content.
. We don't allow people on Facebook to share things that show graphic violence."