Google and Facebook are not opt in. They have your data if you browse the web and don't know enough to block/avoid their tracking techniques, or with Facebook

Google and Facebook are not opt in. They have your data if you browse the web and don't know enough to block/avoid their tracking techniques, or with Facebook if you just have Friends who use it. That argument is bullshit and I'm sick of hearing it. Say you never signed up for Facebook but don't block their tracking stuff, or maybe you do block trackers but also have some friends who use facebook and have unwittingly shared a bunch of information about you. Someone can know just enough to fraudulently sign up for a Faceook profile in your name, and Facebook will helpfuly make suggestions and pre-populate bits of the profile with stuff they already know about you. That person knows a lot more about you now. It's also not a stretch to imaging Facebook or Google profiles being used as ID for credit and other financial institutions in the future, there are already many online services which allow this and we already have things like Android Pay. This shit's complicated, I think we're massively underestimating the risk of trusting these companies just because they haven't leaked user data. Making dismissive and oversimplified statements about it doesn't help anyone.