"At my hotel last week in Los Angeles, I walked up and down my hallway and was able to identify multiple hotel guests who used their full and very unique legal names on their phones, which shows on personal wifi hotspots (see below).
This is essentially like writing your name on a stickie and putting on your hotel door, or wearing a name tag while sitting in the airport. Range is typically 25 to 50 ft. so you can usually narrow down to one of several rooms.
Go to Settings > General > About > Name OR change in iTunes. Also, remove any info that identifies the device (i.e. iPhone, iPad, etc.)."
