It can be frightening to most people who are not aware of this capability.
It does, however, have it's upside. Such technical stuff is and has been available to Law Enforcement to locate someone who is missing or injured and can't call for help if, for instance, they took a picture on vacation and then happened to fall down the embankment or something such as that or even if they shortly thereafter had an accident that couldn't be easily spotted. At least Emergency Personnel would know the almost exact location from where the person was last known to be and work from there.
Carnival Liberty New Year's Eve 2007
Liberty of the Seas 5/2008+11/2009
Allure 1/16/ 2011
Independence of the Seas 12/29/2013 Top-notch!