Stallman is a creep and always has been. There are many accounts over the years of him saying creepy things to women at various conferences/events.
But he also has tech estimated extraordinarily well, and calls out corporate scams a decade before they try it.
Its possible to ignore his sexist views, at the same time listening to his tech views.
see also the Paradox of Tolerance
So if you have actual evidence of inappropriate things that have been said, especially after someone has indicated it's unwelcome, please share that for everyone to see. Otherwise you're just spouting nonsense with nothing to back it up except arbitrary feelings.
Sorry you didn't want to be approached by Richard Stallman but even people who look like Richard Stallman are allowed to shoot their shot without being called a creep.