Eventually, inevitably, I end up banning the troll. Some people are never reasonable, and can never think of other people. Thankfully I am not in charge of the country at a time of crisis.
Johnson's approach to this reminds me of me trying to cope with trolls on a forum. "Can't they just do the right thing?" "Why don't they stop? I'll give them one more chance." "I don't understand why they can't be reasonable. Just another chance." "Really, their final warning!"
The problem in high-profile opinion writing is that there is no way of rotating people out once they are intellectually spent, and the process of brain rot is apparently imperceptible to its victim, so that he (it's always a he) will continue writing a column deep into senescence