I responded to another member that it's very rare that Mazda NA will black-flag a VIN unless you've done something really extreme... like register a salvaged title. They DO document denied warranty claims with specifics such as aftermarket parts, insufficient required maintenance from the owner (i.e. following maintenance intervals), or suspected abuse.
I've had extended conversations about this with several dealer service managers, and a few reps from Irvine HQ. "Voided" warranties is often a misused term.