content: Seems to me there are differences with scale.  It's one thing to see someone and identify them because you know them, it's a different thing to have a database with everyone's information and be able to identify everyone -- particularly if this becomes a 'shared' database. It is fairly reasonable to presume that these images will be linked with other data, e.g. identifiers, buying history, bank or credit data.  Further under current US law, the Government has access to all of it at any time and it is illegal for you to be notified. This gives me pause.