On: Richard Stallman is coming back to the board of the FSF

[fsflover]

Technically, such guideline prohibits anonymous speech, because how you speak can reveal your identity after a certain threshold...

[dang → fsflover]

These are all questions of degree and how to balance trade-offs, so while you've raised one legitimate concern (among the many), I don't think an absolute statement like "prohibits anonymous speech" is accurate.