I always advise younger journalists never to use irony or make jokes on social media, so when I was effectively sacked for alluding to an edible fruit of the palm family, I should have known better. And of course I did know better. I deleted my three-word tweet within minutes. But screenshots live for ever. There are no second thoughts on Twitter, no clarifications allowed. No second chances either. It is judge and jury and will take away your career, reputation and livelihood at the click of a mouse, if pusillanimous employers allow it to. I’d been in countless Twitter storms in the past over Scottish nationalism, hate crime, gender. It’s what Twitter does. So when the editor of the Scottish Herald, for which I had been a columnist for more than 20 years, rang to tell me I was suspended, I thought he was joking.