Random Encounters of the Cellular Kind

Have you ever had this experience-- you walk into a cell phone store and random strangers start giving you unsolicited advice? And you're grateful.  I'm not saying this happens all the time. Certain conditions seem to be necessary:

1) The store must be crowded enough that you don't get assistance from a trained professional in a timely manner.
2) You have been standing in the same location, looking at the same phone for more than three minutes.
3) You must appear confused or at least intensely i...