Tapping on the Twitter icon recently, as I have done for a dozen years, I found a notice from the company, under its new name, telling me that I had been permanently banned, that my account was closed and that I would never be allowed to open another.“After careful review,” it read, “we determined your account broke the X Rules.”No specifics, no citation, no offending tweet. Just, you’re gone. I’ve never been warned, put on probation or otherwise censured or chastised by the company. All I’ve ever heard from Twitter were entreaties – which I declined – to monetize my...