I do not smoke. I never drink. But recently, together with a highflying advertising exec, a leading social worker and a medical doctor - all model citizens, all of us with firsts from Cambridge University - I was out taking pills. Which has made reading the newspapers over the past few days a strange experience. There is, out there, a drug called Ecstasy. According to David Blunkett, this "can, and does, kill unpredictably, and there is no such thing as a safe dose".