The thing that annoys me second about these threads (the first being the perpetrators obviously) is the number of mumsnetters who will wang on about statistics and risk, without actually understanding either.
So remove all men from nursery, I've got no skin in the game and don't care about the menz. But what are you going to do when the next child is harmed?
When the oil industry had a particularly awful year for deaths, the likes of Shell, BP and ExxonMobil went all out to prevent not just deaths but injuries. I was a frequent visitor to various offices, and you could not enter without watching a safety video every time, you had to sit down to drink a coffee (no carrying it further than to the nearest table, not even to your desk, and you must always use a lid), you could NOT walk up a step without holding onto the handrail and every single employee carried traffic light cards on their lanyard and they were forced empowered to give a yellow or red card to ANYBODY at all, no matter what the status. I never visited the more risky sites or rigs, but I can only imagine. And for all that it felt ridiculous getting a red card for not having put the fiddly lid on my coffee cup properly, damn it worked. Accident stats went almost non-existent.
What I'm trying to say is that the same things SHOULD be possible to make abuse in childcare a never incident. Massive, end your business or career penalties for procedures not being up to scratch and staff not following them properly. Government funded support and training. An industry wide review of the actual statistics and every reported incident, and development of procedures that are both workable in real settings AND that prevent people from being able to cover up child abuse.