I imagine that the media will soon be putting a lid on reports of future attacks. I would suggest for FR people that; if an attack occurs in your home region and is not reported, then post it on this site.
They may, indeed. I don't think it will work though. The same media that makes these coordinated attacks possible also makes their existence impossible to hide.
FWIW, my expectation is that we'll soon see call for licensure of cell phones, more warrantless evesdropping on cell phones, including warrantless tracking of individual cell phones by means of GPS and tower-triangulation.
We also may see judges handing down sentences that include "no cell phone use for five years" or "no cell phone use for life." When sentencing patterns reveal a racial correlation to these sentences, they'll be attacked as unconstitutional.
We'll also be seeing different types of social networking activity prosecuted as criminal offenses. There will be cases of ordinary people, setting up a meeting of three or four friends at a mall food court, resulting in a "dynamic entry" attack of residences, based on information from a "Confidential Informant."