So, pardon me but I’m going to ignore most of your questions and focus on this (nearly) last thing you said: “Most of my friends really don’t care about internet privacy at all so it’s hard to discuss with them.” – that, right there, is what terrifies me.
I’m definitely the most geek-like among most of my friends & colleagues. While what Zuckerbergy & Co. (and Google, and Amazon, and…) are doing does concern me, I’m more concerned with the fact that the “average” person out there doesn’t seem to fully understand how computers work, what data is or how it’s managed, and how privacy & access govern all of the above, despite the fact that nearly every facet of our modern lives is tied to computer use.
I have worked in the violence prevention field off-and-on for most of my adult life; briefly, I worked for a national level coalition on a team that specifically addressed how abusers use hardware & software to perpetrate abuse. I learned so much at that job – and I try to caution and advise friends where I can. I also try to educate partners.
I had a partner once who, whenever she would pull out her phone, I would purposely avert my eyes while she keyed in her code; she always insisted that she trusted me – for which I was thankful, but I always said to her “in the event that you wind up in a relationship with someone else, I want you to have good habits”; of course, she presumably has wound up in other relationships, and I cringe to think that if a future partner earns her trust, and she keys in the code where they can see it, and then the relationship starts to go south, and he/she decides to snoop my ex’s text messages, or actually installs a jail-break or other app which allows them to now use her phone as a monitoring device…
As many security experts have pointed out: the weakest link in any/all current security schema is human behavior; we are easily fooled to giving up lots of info; and as much as I do what I can to protect me, I worry about a chain-of-custody with some of my info which may end up exposed due to the sloppy habits of others.