I gave up regular cell phone service 6 years ago and have only recently, and reluctantly, began to carry a pre-paid phone. My hiatus from regular phone use has made me very critical of those that have phones and are perfectly happy to use them at any time in any place. Watch this lovely video.
Try and get passed the fact that they sang in the wrong language. Did you notice all the people taking out cell phones to record what they were witnessing? While the idea of a flash mob is, in general, annoying this one was probably really neat to see. But instead of being present a number of people decided to distance themselves from reality (undoubtedly to post the footage to facebook). Tim Berners-Lee (an avid reader of this blog) loves the idea of the semantic web, but it is unlikely that multi-recording an event is what he had in mind.