The lesson came in the shape of 15,300 tweets and re-tweets with my name on them, and various levels of threats from people who may have never heard of me till then. If they were indeed 15,300 separate, distinct persons, it would be a miracle of spontaneous mass action. Perhaps it was the handiwork of just a few dedicated persons working overtime in an air conditioned call centre somewhere. I do not know. Nor do I know who gave the command. An added dimension was added when personal mobile telephone numbers were put on Twitter with instructions to ring one up.