While I was at PDC I attended a slew of NDA briefings from Microsoft.  During one of them a flash went off and some people got understandably upset that someone might post a picture of a product being shown under strict privacy.  It turned out that nothing untoward occurred and no picture was posted where it shouldn’t be, but it is the perfect situation for products that actually prevent bad behavior in this regard.  A friend of mine, Scott Stanfield, pointed me at this url which discusses technologies that are emerging that will handle this exact situation.