Carrier/rack problems of the 2015 Dodge Grand Caravan

On this 2015, florida based, Dodge Grand Caravan with 58,640 miles, the passenger side active head restraint deployed with the car parked in the driveway and no one in it. It could not be reset as the thin plastic bracket that held a metal restraining bar in place disintegrated under the pressure of the deployment spring and released. In fact it appeared that multiple plastic parts had broken. Checking the internet, this appears to have happened in hundreds of other vehicles in multiple models and model years and Dodge/Chrysler has made no attempt to fix the problem or warn the owners. There are also at least two separate law firms pursuing class action lawsuits regarding this. There also appear to be hundreds of complaints on this site. If this happened on the driver's side while the car was in motion, an accident could have resulted. The Dodge dealer said they have no obligation to fix this and that replacing each head restraint would cost close to $900. They also could not say the driver's side head restraint wouldn't also deploy unexpectedly. One wonders if there haven't already been significant or even fatal accidents related to this. Getting hit by the headrest would cause injury alone this appears poorly designed. The idea of putting a thin plastic bracket under constant strong spring pressure for years is just asking for trouble, especially for vehicles in florida where temperatures in parked vehicles can remain well over 120 all day. How can thin plastic be expected to take this for the life of the vehicle? these parts should be metal. I pushed the deployed headrest back together and secured it with two cable zip ties. As Dodge can't tell me if the other headrest won't also deploy, I have also secured it with cable zip ties to guard against its unexpected deployment. Where is the NHTSA in all this? at least change the design.