Boris wants to characterize Blair's comments as being mainly about the media's treatment of him. If you read Blair's speech, very little of it was about his treatment at the hands of the media. And he acknowledged his complicity.
Boris must be assuming that most people will not bother to read Blair's actual words, and will instead rely on what they hear about it through the media. Would that be the same "media-literate" public who he claims "can almost always see behind the hysteria and the hyperbole, and work out what is really going on", who "find it relatively easy to blow the froth off a story and get to the nub"? Would you like any cream with your disingenuity, Boris?
Misrepresenting Blair's argument is not enough. He must also recast the media as poor, set-upon creatures, deserving of our sympathy, as they struggle in the glare of the public spotlight against the harsh criticisms of the blogosphere. A mistake, that. It is so over-egged that most readers, however credulous, will smell a rat. A "new and terrifying threat"? "Hordes of lynx-eyed brainboxes out there in cyberspace"? Journalists "increasingly accountable, increasingly vulnerable to the pithy rejoinders of the man or woman on the net"?
I don't know if this counts to you as a pithy rejoinder, Boris. But let's see what difference it makes. Are you feeling threatened? Are you taking account? Do you think this post will make the slightest difference to your journalistic career? You, and most of your readers, probably won't even know it exists. You wrote your piece because you knew you could get away with it, not because you feared that you couldn't.