"She can track us!"

Yesterday I witnessed a man and his teenaged son at the grocery store. They had just paid their bill, when the man got a text message from his wife, asking him to buy three additional items. The son said, "Just tell her we've already left the store" (which was packed with people buying eggs, peeps, and jelly beans). The man explained to the son that the wife can track their location. They stayed in the store, picked up the items, stood in line for another fifteen minutes, and purchased the items. Grocery shopping 2013.