That said, and this is key, none of this is about whether or not Minsky did anything. Assuming he did, it isn't even about whether it was with a minor, or a woman of legal age. It's about Stallman having decided that was a prudent moment and subject about which to "Well actually..." at the world. The whole point is Stallman's behavior, not Minsky's.
In all seriousness: what the actual fuck does Richard Stallman's opinion on what does or doesn't constitute rape matter? Why would he think that was a point that needed his quibbling? Maybe that's the judgement under question.