A Tip for Cellphone Junkies: A Phone is Not an Invisible Forcefield.
Next time you have to take or make a call, instead of pacing around like you're in a protective bubble, why not try standing against a building? I know you think you're "multi-tasking" by walking and talking, but you're not. You're only talking and you're in everyone else's way. You are lulled into a state of non-reality when you have that thing against your head. You're the one who should be apologizing for being such a drone. Wake up and snap out of it.