Internet 101: don't provide sustenance to the creatures who sometimes live under bridges.
If there is a hint of the person actually reading your messages, then yeah, I'd agree in many cases. But read the messages this person posted, it is clear after just a couple of messages that they're not responding to anything @GrapheneOS actually wrote, they're spewing nonsense into the ether.
Personally, I don't think it's worth trying to save everybody, focus on people who are actually willing to listen, and have a conversation instead.
This thread is hosted on GrapheneOS's server so I'd assume GrapheneOS team could block multimilliardaire https://grapheneos.social/@GrapheneOS/115584160910016309
It must be hard sometimes not to get quite a dim view of the world when pressed up against this part of it. Condolences.
I mean, it's also not great ux that it shows up where it does and with so much real estate.
LET ME SHOW YOU THE DOOR, MAY I?