We're not sure how many more times it must be said, but seriously people -- stop texting on your cellphone while operating a gigantic vehicle at high speeds. If you're not already convinced that driving a car and trying to tap out a message on a tiny keyboard (or heaven forbid, no keyboard at all) is a poor match, perhaps the short documentary AT&T has just released will convince you otherwise. The carrier is launching a campaign geared towards teens over the holidays leading up to New Year's Eve in the hopes that the youth of the world will be slightly less sure of their invincibility -- at least where car driving and text messaging is concerned. Sure, the video (located after the break) borders on sentimentality at times,
