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 "And even if your phone is turned off, it will still send out Bluetooth signals to broadcast its location." That needs an edit I think.. I'm not aware of any device that would do that when switched off.
@tony @evacide
It doesn't send when switched off, but its last location may have been logged before it was: