1) Anything you (and others) put online is there forever.
2) Anything you (or others) put online becomes difficult to own and control.
3) Privacy is a thing of the past (anyone in public can be photographed by anyone legally but now everyone everywhere can capture anything anywhere and publish everything wherever).
4) You aren't in control of who you are anymore because when you choose to go online or others put you online, others then have the ability to define you. Nothing you do or say ever can go unnoticed anymore. (did it, anyway?)
We are becoming naked to the world and privacy and identity are changing with virtual and real life merging in ways beyond our control. What is that photo above? I found it by snooping.