If you post on any social networking site using a smartphone, I beg you to watch this news story.
Pictures you've e-mailed or uploaded from your smartphone could leak information that can threaten your safety or that of your children.
Towards the end of the video it shows you how to disable this so it cant happen to you.

@ KAM......thanks for the tip.my daughter uses a smartphone to post everything to facebook and no telling how many other places.she is alone with 2 small babies,so i will tell her about this.