One trend among social-networking apps is the ability to combine all your posts and updates with your location. It’s a fantastic idea for some, terrifying for others.

I show off one app called banjo, which helps you find out who’s nearby and what they’re talking about.

Friends and strangers alike: If you are into the social aspect of social networking, you’ll geek out for this. But if you’re particular about your privacy, I will show you step-by-step how to lock these apps OUT so you can stay off the radar.