I mentioned reading Carissa Veliz's Privacy is Power in the "what are you reading" post this weekend, and one of the worst things it discusses (to me) is the way in which other people giving up privacy can also impinge on your privacy (DNA testing sites being an obvious and extreme example, but casual FB posts mentioning seeing you at the coffee shop also impinge).

One of the worst things for privacy is that it's a door that never closes once it's open. I can't do anything about the privacy I gave up twenty years ago other than hoping for it to get lost in the systems it's in. Worse, without live access to any of these systems, I'm not necessarily sure what info is out there and where it is.

(Aside: while I've got a ton of issues with the EU and the way they operate, I appreciate the idea behind allowing people to require companies to purge data they possess for individuals. I don't believe the companies actually do it, and of course the government's excluded, but I like the idea itself.)

And I agree we can over-focus on the tools, and privacy tools are essentially in an escalating war. Every secure tool eventually seems to get cracked (or turns out to have never been as secure as advertised).