So after reading that article, if I were a protestor or insurgent; I would be thinking about how to feed false information to these surveillance systems. For instance creating ghost marches; or faking mandatory response incidents in ways that are likely to get innocent bystanders beaten up or shot by the security services.
Anytime you have a fast feedback loop like this, you're going to be getting a lot of noise and a fair amount of disinformation.
Imagine a scenario in which Anonymous is sending out several hundred messages in multiple formats describing an incident in which "Just saw a guy in a suit shoot a cop at Xth and XXX" features prominently. Especially if police communications were being selectively disrupted at the same time...
If one would consider all the traffic noise, then I can see it being trivially easy (since the traffic would look so much different from everything else), but what if it contained some that weren't really noise? Like if someone piped the output to a database anyone could access?