I noticed that WW never actually takes Ribann up on his challenge.
Let's just say that I've heard some very interesting and none too flattering stories about Ribann's vassal behavior. Besides, I get as much gaming action as I want in real life, with real people, at my local gaming store.
He plays on Vassal, because he would catch a beat down acting the way he does in person... plain and simple. The store I play at is owned and operated by two ex-Marines, suffice it to say... his shenanigans would not be tolerated for very long at all.