There is such a thing as disproportionate response and we must be careful not to engage too much in that. When it comes down to it, him being unable to GM at conventions anymore is probably what should happen...but trying to ruin other aspects of his life is unwarranted and just being needlessly vindictive.
That said? I think the worse sin here is the fact that he really does not believe what he did was that terrible. I'd be much more likely to advise a bit of mercy had he immediately and fully said 'I made a terrible mistake here, I didn't think, I feel bad I made the other players feel this way and that I did this to them'
Instead of what he has been saying: "People are lying about me, Im the REAL victim here, oh no I uh...I uh of course didnt mean it was Rape how could you think that?"
That shows me he really doesn't get it and probably should be shunned fully in the gaming/convention community
In the highly theoretical event that I was handling registration for a convention, and I noticed that one of the registrants was Kevin Wolfe, I'd ask other people with con management experience for advice.
In the absence of advice, off the cuff, I'd propose this response: a communication along the lines of "We have received and processed your registration. We are aware of your history. We advise you to closely read our Community Standards of Behavior (link goes here). Your welcome at GameCon IX is conditional: you may not run any games at our event, not even in the Open Gaming Room. What you do in your hotel room is beyond our authority, but even so, we encourage you to err on the side of caution and good taste."
I suppose the next step is noting which events he wants to join as a player, and either warn the GMs of those events, or give those GMs a veto on whether he plays at their tables? I dunno. I don't have experience running gaming conventions.
This falls short of full shunning, banning and ostracism. It leaves the con open to risk, if he behaves badly and another participant blames the con for accepting his registration. It's not as simple as refusing his registration.
Derek Black turned away from Stormfront. Megan Phelps left Westboro Baptist. Maybe Kevin Wolfe can grow up. I want to leave SOME room for the possibility.
(Yes, I have judgmental opinions regarding Stormfront and Westboro. I do not expect all other EN World participants to share those opinions, but I also make no apologies for holding them.)