Here's something I read about. Most of us take photos using our phone and occasionally these photos are posted on social websites or other public places. What most either don't know or pay attention to is that our cameras will often, by default, be setup to record specific information when the photo is taken such as time of day, location coordinates, etc. People can then extract this information for less than honorable purposes. For example, suppose a person tends to take snapshots of their children at a playground and not giving it much thought they do this regularly. A pedophile may be able to determine that there is a pretty good chance the child could be at said park on certain days of the week and at what time is most likely.