1) This is more of how Facebook makes money with ads and providing "personalized experience" just as Google does. Fundamentally not a flaw in Facebook, but a de

1) This is more of how Facebook makes money with ads and providing "personalized experience" just as Google does. Fundamentally not a flaw in Facebook, but a debatable practice. And do you have source Facebook would share my age and my gender to third-party even if I list them to be private? The only thing that might be possible is Facebook internally does the calculation. Giving away to third-party vs FB doing the computation aren't exactly the same. 2) If you join an online community, you have to pay a price. You might tagged your friend or your friend tagged you and the setting is not strict enough, then how is that Facebook's fault? 3) Again, that's the price a social network has to pay. Back in the days people take film-based pictures and there is no way to massively store and distribute to the world. Now the digital age has changed the way we distribute information about one another. Doesn't matter if Facebook is 100% free software and decentralized. One person leaks everything leaks. There is no real 100% anonymity. You have to make contact with another human being.