I don't think wide spread panic and paranoia will do much relax. In the real world, modifications with the potential to cause serious damage, will be taken seriously . I think dealerships will use some discretion when cars are brought in for warranty work. For, example: muffler changes, CAI's etc, are an entirely different animal than a tune. When you start tuing, and fooling around with spark advance and air/ fuel ratios it gets serious. I don't know anyone in their right mind who would dispute that. But I don't think a dealer will cancel a power train warranty because someone changed the mufflers. Don't panic.Drive your cars.