Complicated, time-consuming, and inaccurate: How will the cops know "protester" from "person walking down the sidewalk on the way to work"?
If the person walking down the sidewalk is mixed in with the protesters they may not. But shutting down cell towers effects everyone in the area not just a few people who may be innocently mixed in with the protesters. Add the fact that most people not involved are going to avoid protest area and your argument is fallacious.
Tell that to the several hundred New Yorkers arrested during Occupy Wall Street whose only crime was working adjacent to where Occupy was holding action that day. What's fallacious is the idea that people not following the protests, or protest movements, have any clue when, where, or why protests would be going on in order to "avoid" the area. Occupy was in Zucotti partk, but then they'd move around the city with announcements on Twitter--if I'm not protesting (or not "with" whatever movement they're protesting on behalf of) why would I be following them on Twitter?
Or, more accurately, how will they know once the list of "protester phones" is compiled that the protesters won't whip out cash-bought drop-phones that aren't associated with their names?
As phone location information gets more accurate they just have to identify them by geographic location. Even with current technology this is going to cause far less collateral damage than shutting down whole cell towers. And I never said anything about only affecting the protestors. It's simple a case of limiting collateral damage.
Except we've already established that "geographic location" is insufficient in most major cities... Am I "on the list" because my phone is on my desk by the window and a protest is going on outside? How "good" do you think that location data is going to "get," and why would having it be better than it is now be necessary? Or even possible for consumer-gear? They hard-limited consumer GPS to accuracies no-better-than several hundred feet after 9/11 (apparently some idiot thought the terrorists used GPS to find the WTC rather than just looking for the tallest buildings in New York...) and I can't imagine that being lifted so we could pursue some hare-brained scheme like this.
Frequently we hear about police dragnets grabbing up hundreds of people at a time, a significant portion of whom (predictably) weren't protesting and were simply walking down the sidewalk to go to work, school, or someplace else non-interesting.
But they don't sweep up everyone in a square mile of the protests which is the effect of shutting down cell towers. You seem to think if you can't completely eliminate collateral damage it's pointless to even try to limit it.
Correct, but so what? If we're assuming civil discourse and order has degenerated to the point where the police would consider "targeted shutdowns" of individual mobile phones to be "okay" I'm not sure why they'd care one iota about the non-protesters out there? Yeah, a phone shutoff might mobilize some people to action... But others might just assume their phone is goofed up and use a landline.
The purpose is to stifle dissent, and in doing so, the police-state doesn't care if somebody who "hasn't done anything wrong" gets their rights trampled on. Indeed, such "even" applications of violence to everyone in the area are still useful as intimidation tactics aimed at people who "might" be willing to protest, but who have reservations.
This is where you're really off base. Trampling on the rights of people who haven't done anything wrong engenders dissent. It certainly doesn't stifle it. At best it may limit people acting on their dissension out of fear but it certainly isn't going to endear them to the state more. The idea that abusing people will make them like you more is idiotic. Past police states worked through fear of voicing dissension. Any attempts at actually stifling it were laughable at best.
Yeah, I remember that time that San Francisco's BART turned off cell service to disrupt a protest and the government fell, all of those government officials were arrested and fired!
Oh, wait, it was a wet-fart: Protesters (who were already pissed off) got more pissed off than they already were. They had a protest over the protest. And that was it.
Government will start caring about "collateral damage" for mobile phone shutoffs when the blowback does some professional damage to them, personally--and not one second before. Keep in mind: This is the same government so ethically bankrupt it is willing to kill people based on "sim-card identification" alone, even though SIMs aren't actually a valid identifier.