I still don't see this group as an event within an all-ages, general-audience gaming conference, assembled on a walk-in basis.
Yeah, this. I once ran, with unanimous consent, a sword & sorcery game in which sexual violence was explicitly on the table-- for my brother, my ex-girlfriend, and a married couple. It was one of the very best games I've ever run, and one of the very best scenes in that game would have (rightly) gotten at least three of us banned from any socially responsible Con for life.
I also had to stop playing with a former acquaintance of mine, because he'd somehow divined a number of unpleasant facts about my childhood and was deliberately using them to make me uncomfortable in every game we played.
Games with Mature content require greater player buy-in and consent than less controversial fare. And some topics are just more Mature than Mature, and require an
even higher degree of due diligence to make sure "yes" really means "yes".
There is a tendency for a certain group of people to try and downplay and hush up or minimalize any account of sexual assualt or wrong doing. From 'oh we just shouldnt talk about this anymore, it was handled' to 'Oh no he didnt mean THAT, he meant this totally other innocent thing!' This kind of mindset is terribly disappointing and to me it really showcases why we DO have to really discuss these incidents still.
At the very least, we need to keep discussing this specific incident until either
absolutely everyone knows not to let this guy run public games, or until there is a
genuine apology that indicates he understands he did something very wrong, why it was very wrong to do, and
why he did it.
But also yes... we need to keep discussing these things until everyone who has not personally experienced them acknowledges the fact that many, if not most, gamers have.