...paradoxically, the closer we get to systems that achieve a reasonable score in keeping evildoers out, the more vulnerable we are to attack from those evildoers who bypass our filters.

So when the Attorney General of a US State speaks of requiring MySpace to achieve giant strides, it's worth suggesting that he's not only being unreasonable; he may even be making things worse.

The simple argument is that if parents think MySpace is a safe place to leave their children alone, they are likely to leave them far more vulnerable to the predators who do break in, than if they recognise the reality of the situation.

That reality is that predators will break in. The way to deal with it is to supervise and monitor, so that people know they are being watched - exactly the same way you stop fights in the school playground. It's not rocket science.

Hear hear.