I think people complaining today about #CNN giving #Trump airtime should consider that it seems his performance served to show the country that he hasn't changed, and he's not being misreported on, we see directly from him that he really is just as awful and not worthy of election as he was last time he lost.
Had the event not been broadcast there would have remained a more doubt among people on the fence, that maybe his handlers finally got through to him that he has to act different if he wants to be president.
So it's a case of, Don't deplatform, instead let people show you for themselves how awful they are, so they can be judged with even more finality.
Also, I suspect it was a no win situation for Trump. Had he pretended to be moderate then his supporters would have gotten upset.