Salving consciences and allowing censorship at the same time
I doubt the DPA commissioner's words, though unfortunately required, will have much effect. What is needed is the paedo-hysteria that has gripped the UK to diminish, and that will not happen unless we get a government which is not grabbing at the opportunity to extend state control over all its citizens. For all the lip-service that the government has spouted about this, they have too much vested interest in maintaining the state of anxiety induced in its citizens about carrying out activities which they should be able to do freely and without much restriction. This is compounded by the worst kind of control-freakery which the various local government and police forces seem to attract like wasps to jam and honey. On top of that, we have the parents who are largely neglectful of their children, but wish to salve their consciences about this (and also in the light of the paedo hysteria, are vulnerable to it), and so they take action where it is easy and visible, such as "not even other parents should take photos of my child at school events", but which figure little in the light of being unssupportive of their child's education in general and not bothering about their children when they get older and at risk of being misled by their peers, and so on.
So, the commissioners actions are a drop in the ocean, when an full-scale ocean-draining scale of action is required.