> But what's the point of bringing a phone at this point?

I don't have much experience with protests, but I'd think people still need to commute to them. Either by their own car, public transport, or uber.

It would be nice to have your real phone for the commute to/from the protest, or in case of emergency, or if you leave the protest for some food or coffee.

A lot of cameras have built in wifi now, so when you leave the protest you could upload your camera's photos through your phone.

There's still a lot of utility of having a phone and selectively being able to prevent signals emanating from it.