…says the Doper. 
You’ve probably heard this before, but it bears repeating - you can’t call customer service, because you are not the customer. You are the product.
If you purchased a million dollars in ads, then there would be a number you could call. Maybe.
If you’re referring to my post about the locked/flagged blog, it was in May of 2021. It happened a day after I posted a photo I took of the Hernando de Soto Bridge (where I-40 crosses the Mississippi) with a caption that read “Right before the shutdown”. Maintenance workers had discovered a crack in one of the girders on the day I took the photo and it was closed to vehicular traffic for several months thereafter. Coincidence? Probably, but who knows.
Well, one reason.
The other reason is that if they had standards, you wouldn’t be in them. 
I personally would never belong to a community whose standards admitted people like me.
It’s worth recognizing the melodious symmetry between “Frodo” and “Groucho.”
That man made a career of plagiarizing me!.
This is a hijack, but Facebook et al, but especially FB are really easy to fool when it comes to account validation… if the account is a Facebook Developers account, rather than the normal “post cat pics” account.
I worked for a smallish dev company making games on Facebook, and as I did not want a Facebook account, I made a fake account, photoshopped my fake name into my RSA ID (what do they know about how a South African ID looks?). Then I did it again and again… and again. I was building “share” functionality and I needed friends!.
I was not going to use a real account and subject my real friends to our very spammy marketing campaigns. So my small group of fake accounts all spammed each other happily. I just checked, and the ones whose names I recall are still active, more than 10 years later.
Yeah. ‘How can I phone Facebook?’ is a question that is somewhere in the same ranks as ‘how do I drive to the Zoom meeting?’ and ‘what kind of cable do I need for WiFi?’
The Miata club expects you to drive to the Zoom-zoom meetings
Similar to the Talking Tina incident, a friend of mine was banned for quoting Jim Morrison (Father, I want to kill you). He somehow able to get it re-opened in a day or so.
Can you imagine if FB had a phone number for users and all of the insane fucking cranks they’d have to deal with? The algo makes mistakes all the time and they don’t care. It’s a money maker in the long run even with a few casualties.
I see this type of stuff regularly on my FB feed. Did you possibly have something else in a post that could have been misconstrued as a threat or call to action against him?
In this and the OP’s case, it’s likely an example of defective Facebook algorithms gone haywire.
I just endured the pain (oh, the pain!) of a 12-hour Twitter suspension.
I had responded to an incredulous post from an infectious diseases physician who likes to tweak antivaxers* and other cranks. The post concerned an M.D. who denies the existence of rabies and other viruses. My response:
“C’mon. Didn’t ya know that, like, Pasteur made up that rabies thing? If you’re bitten or scratched by a bat or a mad dog, or a raccoon attacks you, just put an onion in your sock and drink some chlorine dioxide bleach, and you’ll be a-OK!”
Twitter considered that to be “violent speech”. 
Never mind actual promotions of ethnic hatred and violence that pervade Twitter, thou shalt not mock germ theory denialists.
*By the way, why does Discourse flag use of the term “antivaxer” when you’re about to post? Does it consider that “hate speech”?
Huh? In what way is it “flagged”?
My wife got locked out of her Instagram and FB accounts after she was hacked about 3 years ago. She was using her Instagram account to promote her new cookbook, so it was a real issue for her. I ended up contacting a former employee that quit to go to Meta and he managed to contact someone internally to recover the account.
When I type antivaxer while composing a post, a dotted red line appears under the word.
Obviously that doesn’t prevent me from posting it, but it seems to trigger Discourse in some way.
Much the same thing happens on Twitter.
Discourse thinks that it’s not a real word or a misspelling. It’s not a conspiracy.
No conspiracy was implied.
The fact that Twitter does the same thing (and used to ask posters if they really wanted to use the word) lends credence to the idea that platforms think some people will be offended by the term. Which they are.
Antivaxers hate being called antivaxers.
Is that Discourse causing the red squiggle or is it your web browser?
It’s spelled antivaxxer.