Updating your status on Facebook or Twitter or announcing where you are using location-based social networking sites such as Foursquare could be putting your home and possessions at risk.
Confused.com's House of Horrors Facebook app shows how easy it can be to find out information about you online, making you an easier target for burglars.
The app might give you a shock or make you laugh, but it will certainly make you think about the safety of your home contents.
We filmed the reactions of people using the app - what will your reaction be?
