Never seen it before....until today twice! First time in Minneapolis, I was coming up to a 4 way stop, there was another car oncoming that made his stop and was going to proceed through, when here comes this guy on his ten speed just blew through the stopsign right in front of the car with one hand on the bar, the other holding the phone he was looking at. I don't even know if he knew he went through an intersection! Good thing that driver saw him and waited! The other was in the suburbs, I was a little ways back and saw this girl ride down the WRONG way on the sidewalk, through the crosswalk, all while looking down at her phone. Good thing I was a ways back and going slow, vehicle traffic coming from the wrong way (yes a bicycle is a vehicle) can take a driver by suprise!