Over the weekend the Israeli army warned the country to avoid answering any SMS messages from unknown senders. It turned out Hamas and its terrorists allies were trying to use the location of cell phones to calibrate their rocket trajectories.
Hamas and other Gaza-based terrorists were also reportedly making heavy use of Facebook and Twitter to discover the exact impact location of rockets they had already fired, again, to help re-calibrate the next wave of missiles.
Meanwhile, Israel also made use of cell phones in the ongoing Gaza conflict, but did so in order to save lives. As part of its effort to avoid collateral damage, the Israeli army made well over 20,000 calls to the cell phones of Palestinians living in Gaza to warn them of impending aerial strikes on nearby terrorist targets.