Re: @palpy: Yup. Quite bullshitty.
And what about when they get it wrong? When they report someone's innocent files as child porn because the person at microsoft doesn't get the context of the file?
This has already happened before the Internet (or in the early days). Some people who had their kids bath pictures processed at the local drugstore were arrested and prosecuted. There were eventually found innocent, but at great cost to their lives. (I believe that might be found on google as I am reporting from memory on this one and this was not the only case)