It’s 11:00 p.m. Do you know where your kids are? If the answer is no, simply go online to see where and who they’re with.

Geo-location tools have made it even easier to find your kids, friends, and even strangers. Facebook recently replaced their geo-location tool “Places” with a new integrated “Check-in” tool. Similar to the “Check-in” that Foursquare made famous, users can now post where they are and tag who they are with. Plus, these improvements make geo-targeting even better for marketers since sales messages can be tailored by demographics, interests and now location.

But most upsides have downsides. And if we know where everyone is, so does everyone else. Websites such as RobMeNow.com have popped up to prove the dangers of geo-tagging by posting updates from people who give away their location. A post that reads “I am going to Hawaii for a week” also can be read as “My house will be empty for a week.”

Thankfully, Facebook has not only become a leader for geo-location tools, but also for geo-location privacy settings as these features can be disabled and/or monitored. A new update on Facebook’s iPhone app also increases security by allowing users to send updates only to certain friends.

Like it or not, geo-tagging is here to stay (just be sure to tag carefully).

You’re it.