[daheza]

True, cameras can be taken away or smashed after the fact destroying evidence.

With my phone I can stream video to a cloud so that it can't be deleted. The ACLU used to have an app specifically for this but it seems to have been discontinued. https://en.wikipedia.org/wiki/ACLU_Mobile_Justice

[iamnothere]

If you are ok with the low quality, you could use a radio to transmit fast scan TV to a nearby receiver. Use a repeater if you need to get some real distance.

FPV drones often use this and could be a good source of parts. Or encode the feed and send through a small portable ham radio if you want a challenge. https://irrational.net/2014/03/02/digital-atv/

[chaps]

Sure, just be careful not to fall into the trap of technosolutionism.

[Ccecil]

I have an Eye-fi SD card which can send photos via wifi. Wouldn't be too hard to make a receiver that send from a raspi or something automatically.

Seems they are discontinued but there are other options that work similar such as "EZ Share"

[chasd00]

the world isn't perfect, you do what you can. Just take a small RunCam or something and keep in it your pocket and be discreet when you're using it.