Signing up and using facebook is voluntary. But how do you deal with other people signing up and giving facebook information about you? These people certainly don't have malicious intent, yet the end result is that facebook has a pretty good profile of me even though I've never once signed up for the service. Off the top of my head, they have:
My personal email. My work email (can infer where I work from this). Many of the people whom I know who searched for me on facebook. Highschool friend links (can infer my highschool and possibly even age from this). I know for a fact that they have photos of me tagged with my name.
I didn't authorize any of this, yet there it is. Never before has it been so easy to aggregate this sort of information, or perhaps even possible.
My personal email. My work email (can infer where I work from this). Many of the people whom I know who searched for me on facebook. Highschool friend links (can infer my highschool and possibly even age from this). I know for a fact that they have photos of me tagged with my name.
I didn't authorize any of this, yet there it is. Never before has it been so easy to aggregate this sort of information, or perhaps even possible.