Four U.S. Senators have written letters to Google, Apple and RIM asking them to stop offering apps that would help possible drunk drivers avoid the police because it is a threat to the safety of others. Several apps claim to offer a service that alerts the user when they are close to a DUI checkpoint. The only company to respond, RIM, has agreed to pull the DUI checkpoint apps from its store. It is nice to see that Google and Apple are willing to stand up to these Senators. Clearly, this is a First Amendment Issue.