Usually when people write or tweet to me, it’s to agree with me (or something that I’ve written). This is a biased function of, firstly, the fact that people are more likely to seek out views they already hold, in order to reinforce them, and, secondly, the basic human desire to be chummy with our fellow human.

So when, last week, I wrote a blog called ‘It’s Time to End Podcast Self-Promo on Twitter’ I was surprised, and…