I think that it's a little bit of a problem with a lot of the modern "social web" mindset; it all implies that you should feel comfortable doing everything in public, with the whole world watching you.
The problem is, there are people for whom this really doesn't work well. Some might just personally feel uncomfortable about it. Some might be concerned about future career prospects. Some might be women, who are worried about online harassment. Some might be people with stalkers, who are trying to avoid any kind of traceable online public trail.
This whole "share all the things" mentality leads to somewhat creepy exposure of everyone's private lives to governments, corporations, the general public (which can act as a mob on occasion), and also specific private individuals who you might be trying to avoid exposing things to.
The problem is, there are people for whom this really doesn't work well. Some might just personally feel uncomfortable about it. Some might be concerned about future career prospects. Some might be women, who are worried about online harassment. Some might be people with stalkers, who are trying to avoid any kind of traceable online public trail.
This whole "share all the things" mentality leads to somewhat creepy exposure of everyone's private lives to governments, corporations, the general public (which can act as a mob on occasion), and also specific private individuals who you might be trying to avoid exposing things to.