The more there is known about you, the easier you are to be manipulated.

If you read George Orwell‘s 1984 or watch the Cambridge Analytica documentary on Netflix you get an idea.

Privacy brings security under totalitarian regimes or in countries that shift in that direction. They might say if you have nothing to hide, you have nothing to fear, but there are unjust conditions under which you have to hide things, like that you belong to minority that is targeted by the authorities. Like the nazis did in the third reich, where privacy was reduced during their takeover. Or that you belong to a party that is suddenly framed as evil and enemies of the nation. Or if you have connections to "traitors" or other "scum".

I'm in no means an expert here, but over the last 10 years or so, I've been trying to learn as much as I can. I am still in the boat of trying to find meaningful, impactful ways of explaining to people around me, why they should care about privacy.

Here's what I would challenge anyone who takes the time to read this to do. Choose a random user in this thread. Any one of them. Go to their profile page, and see what you can learn about that person based on comment/post history.

Did you get an idea of where in the world they live? The problems they're facing? The things they like? Now. Think like you were someone trying to harm/exploit them. Think of some products you could put in front of them that they could not live without.

Now we take that information, and start to put it together, we think, okay how do we manipulate this person into purchasing this thing.

Maybe we target a fake news article, stating "(target user's generation) choosing between paying rent and purchasing (target product)"

Now that person starts to think "whoa, in not the only one that's struggling with this decision, and others are choosing the purchase"

Now, maybe we target an influencer video to them, about how much better their lives are with that product.

Pretty soon, we put together a picture of how quickly and easily we could create an algorithm to manipulate someone into buying something that they would not have made the informed decision to buy. Now they value the product even if they can't afford it...

I'm literally realizing this as I'm typing it... And it kind of terrifies me.

All of this is completely ignoring the concern of government entities, with I'll intention, using the information against you...

Here in the States your data can not only be used to trace where you live, and who your loved ones are, but also how to assure you will be convicted of an imprisonable offense, given the average American commits three felonies a day (mostly violations of the CFAA. If you're not a pro-authority fascist, espionage and conspiracy can often be tossed in to extend your sentence.)

For most of us American shlubs, it's not a big deal. If you're a ten year old girl and make your own Facebook page (that's a felony) no one is going to care much...

...unless you have significant liquidatable assets known to law enforcement.

...unless you cross the police on an unlucky day and one of them holds a grudge.

...unless you have enemies in high places, say, a state senator.

...or unless an official wants your real property / intellectual property / spouse and you're in the way.

Then, yeah, it's a matter of finding something that will convince a judge or jury that you need to be locked away. And if you are as privacy-conscious as a typical US citizen, they will find something. Maybe something even worth sending a SWAT team to serve your warrant over.