I think they're referring to this article, which took his quotes entirely out of context since Stallman never said that the victims were willing (quite the opposite)
https://www.thedailybeast.com/famed-mit-computer-scientist-r...
https://www.thedailybeast.com/famed-mit-computer-scientist-r...
https://www.vice.com/en_us/article/9ke3ke/famed-computer-sci...