Social networking sites provide a "potential gold mine" of information for criminals, with many users unwittingly publishing their addresses, and full details of where they are and their holiday plans.
A survey of 50 former criminals, undertaken by the insurance company More Than, found that many burglars undertook a considerable amount of research before attempting to steal from people's houses – research that is easier to come by in the age of online social networks.

Hence the wonderful setting of "friends only".

The simple point is do not share where you are in case someone is waiting for you to be else where. Look at the numbers of footballers robbed on a saturday afternoon.