As of yet, there hasn't been a true walking-while-texting risk study. But we know that in 2008, over 1,000 pedestrians visited emergency rooms as a result of texting or chatting away on the phone while strolling down the street. And the trend just keeps spiraling upward. It's gotten so bad, there is now an app that can show the ground for you, so you don't have to worry about pesky things like oncoming people and walls and such.
Because the solution to this problem couldn't possibly be "slightly less texting."
And yes, people are dying from this. In a parking garage in Melbourne, a teen plunged seven stories down after walking over the safety barriers mid-text. A man in LA was hit by a semi truck while texting. One could surmise that this problem could be so bad, a texter could walk right into a bear and not even know it. Oh, hey, that totally happened: