This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
If you have to ask, it probably isn't needed in your application. Seriously, warnings aren't looked at in most business applications. The first example that comes to mind is an application that troubleshoots database connections.