I mean what was written on https://rms-open-letter.github.io/ :

> Richard M. Stallman, frequently known as RMS, has been a dangerous force in the free software community for a long time. He has shown himself to be misogynist, ableist, and transphobic, among other serious accusations of impropriety.

I think if someone wrote it themselves as a comment here on HN it would constitute flaming and would get flagged.