If it is true then that was bad, and I am sure that gave him a reputation that on a campus likely burned like a wild fire (it sure would do that on my university if anyone said something like that), but what is an appropriate reaction be now several decades later?
The second thing the appendix listed was a mattress in his office whose primary user were most likely RMS himself since he kind of had a reputation of living in the university.
Living in an office doesn't excuse having topless people on a mattress in your office.
The 80's was a different time, but not that different. Unless the "topless people" were RMS himself sleeping on it, I have a hard time believing it. In theory I can imagine (but I doubt it) a warm summer where a team of emacs collaborators were all living and sleeping in the university office room, but I strongly doubt the implication sex went on there.
Gotta love the mental gymnastics on HN sometimes.
This isn't just about him describing a "sex trafficking victim" as "entirely willing", and hence not a victim of "sexual assault". This is wrong on so many levels.