So what? The question was "why aren't you lobbying to have helmets banned?" The answer is because it ultimately makes so little difference to anything as to not be worth the effort. Even limiting ourselves to the agenda of cycle safety and ignoring the million other things we could usefully be doing, the payback from encouraging sensible driving, or getting more people cycling, or cycle training, or better designed roads and/or cycling facilities, or ... is so much greater than the frankly rather tedious arguments over whether helmets save lives that it makes the latter look more like medieval angelology than useful contributions to the road safety debate. And given that it makes so little difference, not to let people do it - or not to do it - if they want to - or don't want to - is nanny-stating of the highest order when so many much riskier activities are still permitted