From what I could see of its trip on social media it originally started with civi pilots having a laugh at the wording and debating what an ATCO could do that was useful while airborne. Of course including their ATCO mates.
It then crossed via friends still serving back to the Mil side of things which is where it got nasty. Then it appear on social FB groups and exploded.
The original didn't have any black lines on it.
The publishing of it would not have gone down well with a lot of crew as there is usually shall we say guidance about passenger information which we may come into possession of. Basically you don't do it. Its usually focused around medical issues in flight and deportees.
On the 25th of May a thing called GDPR comes into force. Now would putting that letter on facebook be considered a breach?
I am more concerned about the chaps mental health. He is not the first and won't be the last to chance his arm for an upgrade. These days though most pilots can't even upgrade there family's never mind strangers.