There was once a time when people would build huge collections of albums full of photographs and shelves full of home movies. More often than not most would just end up in a dusty attic somewhere. The people who would often get to see the pictures and movies generally weren't interested whilst all the while more underhand archiving and surveillance went on via certain technologies built into their consumer goods unknown to the general consumer or via certain processes required for development services.

Now we have Facebook where people can legitimately optionally stalk people at their leisure, and only people that want to see the pictures will actually look at them instead of having to sit through sessions of browsing through photo albums that may or many not be boring depending on whether they were genuinely interested or not. Technically only people that have been granted access can see the images and only people who are actually interested will look at/browse through them. There's even the option to comment if you're not already texting, skyping or actually talking via a telephone call.  Which means that they'll potentially get more use out of them than being sat around in dusty old photo albums and unsorted picture packets. 

Instead of Kodak making all the money its now Facebook in a world where people can instantly take snaps and don’t really need to print pictures anymore, although as far as I was aware Kodak is still around with fingers in many digital image technology pies.

The digital medium obviously has inherent flaws as far as privacy is concerned, more so than the days when people that used to work at photo development stores might view, discuss and maybe even archive (as the various technologies became available) for various other reasons before you went in to pick up your developed pictures. I guess there were far less people in the loop back then who could potentially abuse the flaws of technology in order to access media which should be private for the main part, generally the nature of modern technology allows infinitely for more potential entry points than there used to be whether authorized or unauthorized, wanted or unwanted.