Okay, should I assume you dont value yours? Privacy is a human right. There is no ethical argument for depriving humans of their rights.
If you want to argue that privacy is not a right, we can start there.
If you want to argue that privacy is not a right, we can start there.
You can give up your "human rights" for convenience/pleasure as long as you can reassert them down the line.
Signing in via Facebook is also a deliberate choice.