People must know when communicate in open channels neither in closed area with only one or few persons which you know whom are. If you communicate in open areas like you spread information on your wall on Facebook you must consider that this can be spread worldwide in a big tempo and too many recovers.
Another important issue to remember is that information you only share with known people in restricted manners at the internet can be attacked by hackers. In general I will say that be very careful by how you use the internet for communication when you have information that for some reason are not common. Then you must use secured communication programs for sending the information or if necessary take advice and help of professionals of this matter.
Strictly I mean we should discus if the internet today are safe enough to send all kinds and information and are the discipline of organizations and person using internet good enough in the issue of confidality?
I mean that every information you put out on public places on the net you must consider as open for everyone even though it is on an area with restricted access.