A recent study suggests that American teenagers text away to the tune of about 80 messages a day, almost 2,300 a month. The dangers of texting while driving are well established, but what about texting while walking? A 15-year-old in New York state fell into an unsecured manhole while she was texting. Another texting teen was killed on a crosswalk. Who is at fault in these incidents, and do we need legal restrictions for distracted walkers who text?