If Fran really did ban Twitter for the rest of the year, then kudos to him....I hadn't heard that.
But as it relates to the caller, there are two things he could have done. One was to ridicule the caller by questioning his fandom and making a big point about it. The other was simply to look at Dolph and say "Next caller please". Sometimes there are comments made that don't deserve a response....that was one of those times in my opinion and I think Fran made the wrong decision there.
But then when he was asked about it, he could have simply said that if callers want to call and complain about him (Fran) then he is more than willing to take those calls, but that calls critical or demeaning of players are off limits and he won't dignify those with a response. But instead, he continued to ridicule the caller and continue to call attention to it by once again questioning the caller's fandom and making it a much bigger deal than it needed to be.