I think it depends on circumstances. In a fair, level, grounded debate this guy is meat.
HOWEVER, since he doesn't rely on facts or debate thereof, it's only propaganda left behind. Due to the fact that he is already banned and never asked to be reinstated, he should be summarily booted and his drivel removed.
It's not censorship, it's enforcement of TOS rules that we all have to live by except TheWho. He's the one getting special treatment, not "us."