They don't want to ignore him. For their own peace of minds, they probably should. If its masochism, as you say, then it is masochism for the people on the receving ends of his posts, and it is up to them to ignore him.
He got what he wanted. He wanted people to take notice, and he did.
Ironically, even now, if he had some sort of Machiavellian ulterior motive to all of this, it certainly is working.
Look, he and I had numerous differences in the past, especially regarding the Twin Towers, where he basically said that it was a good thing they were knocked down because they were ugly. That got to me. But you know what I learned?? I am the only one who can decide what gets to me and what doesnt, especially when the ones doing the provoking are thousands of miles away under the security of the internet. Because I guarantee you that if he, or anyone else here, met me, or Vinman in person, they wouldn't even think about saying that stuff to our faces for even one second.