Read about this guy's story today. He brought his mustang in for service and the mechanics took it out for long ride in 1st gear redlining it to clean out carbon deposits. The incident was caught on his dash camera and he is claiming damage to his car. The issue has not been resolved, but the dealership reputation is taking a bad hit through viral bad feedback pretty much everywhere.
FORD dealership abuse - The Mustang Source - Ford Mustang Forums