Fifty-five percent of all new cell phones are GPS-enabled. If you have one of these phones, ask yourself: Do you want your friends, family and colleagues to know where you are right now? Privacy Lost: These Phones Can Find You asks that question and more.
Reminds me of something that happened more than once at university. I was biking to class and I bumped into my girlfriend and one of her friends. My girlfriend asked me why I was biking in from that side of town. Her friend just kept walking saying "you don't want to know", or something like that. A GPS-enabled phone with Social Mapping could severely hinder that type of behavior. Or maybe encourage it. Good or bad?
Generally I'd like to use Social Mapping services like Loopt and iPling to find my friends - some of the time. Would I like my friends to map me? Probably not so much.
