Personal and Public in IoT Security

IoT devices present us with an interesting combination of concerns in the private and public spheres.  On the one hand, a poorly secured IoT device can present a safety hazard to its owner.  An insecure or poorly designed IoT garage door controller, for example, can lead to burglaries, improper operation of the door, etc.   Some of those same vulnerabilities can allow the device to be used in attacks on other parties, the recent Dyn attack being a prime example.  I am hard pressed to find a corresponding linkage between personal safety and public safety in non-computerized devices.  But even if other parallels exist, the scope of possible problems that can be caused by insecure IoT devices is troublesome.