Yael's post demonstrates something about digital privacy/security that I think a lot of people miss: there is no right answer, just a series of trade-offs. And every person has to make their own decisions about which trade-offs are worthwhile. https://blog.yaelwrites.com/options-for-phones-at-protests/
Options for Phones at Protests

Simply showing up to a protest leaves you susceptible to all sorts of surveillance, including cameras, drones, facial recognition, and more. There's not always a lot you can do about pernicious street-level surveillance, but you do have a lot of choices when it comes to your phone. Because there's no

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@evacide but it also presumes informed decision making.
Someone out there brought their phone without realizing the potential consequences and wouldn't have if they'd known.
Informing everyone is hard.
Therefore some choices weren't fully choices but accidents.