Many years ago I posted that I could not see anything wrong about sex between an adult and a child, if the child accepted it," Stallman wrote. "Through personal conversations in recent years, I've learned to understand how sex with a child can harm per [sic] psychologically. This changed my mind about the matter: I think adults should not do that. I am grateful for the conversations that enabled me to understand why.

https://arstechnica.com/tech-policy/2021/03/richard-stallman-returns-to-fsf-18-months-after-controversial-rape-comments/

Took me a bit to find, but also he talks about how the Minsky scandal was a-okay in that same article. So maybe I should say he mildly changed course instead of pulling a 180. Still a strange opinion to hold.