Like Brill, Glenn also is inclined to encourage users to say no to GPS data collection on their devices. He notes it's fairly standard for apps to ask permission to collect it, and people routinely say yes, perhaps not knowing what they're really agreeing to with GPS. There is definitely a privacy issue related to taking a photo, publishing it online with the geotagging data embedded in it, he adds.

"It also boils down to being careful what you download," he concludes.

Ellen Messmer is senior editor at Network World, an IDG publication and website, where she covers news and technology trends related to information security. Twitter: @MessmerE. Email: emessmer@nww.com.

in Network World's Wide Area Network section.