The ASBOrometer is an iPhone app that can help you avoid undesirable areas in the UK.
In the UK courts often issue Anti-Social Behaviour Order (ASBO) against individuals who have been engaged in anti-social behaviour. The orders are designed to be imposed after minor incidents that would not ordinarily warrant prosecution.
The ASBOrometer uses the data of where ASBO's have been issued to show an assessment of anti-social behaviour at your current location. The app also shows how many parenting orders have been issued and how many crack houses have been closed in any area.
The application uses Google Maps to give you a visual overview of the areas that you might possibly want to avoid.