i don't "text".
i communicate with people electronically in front of a computer with a big monitor, the old-fashioned way...
but from what i've seen, it's an addictive pastime.
it must be distracting.
walking around the south station area, i often have to dodge pedestrians who are too busy texting to watch where they're going.
i can see why the MBTA felt the need to take the drastic measure of completely removing the distraction from the picture...