Mobiles in schools is one of many issues over which the Mail obsesses, but that doesn't mean a ban is wrong. Indeed, in May an online poll in the Guardian produced a three-to-one vote in favour of a ban. The poll was prompted by a statement by Sir Michael Wilshaw, the new chief inspector of schools and head of Ofsted, that mobiles in schools were disruptive. When he was head of Mossbourne Academy in Hackney, east London, he banned them and said the decision produced immediate benefits.