It is likely untrue, but anecdotal. That said, how are subprime loans still legal??
EDIT: BTW, a subprime loan is just a loan that comes with terms that aren't as good as they could be due to the applicant having some sort of issue in their application (eg, no credit history, a bankruptcy, lots of missed payments, no collateral, lots of other debt, etc.).
Why do you believe this?
More likely is someone who has had a remote start block activated in the past (keeps you from starting the car) likely experienced engine failure while the car was running and associates it with past experiences.
This has no bearing on any argument for or against this practice, in any way. If it was found to be true that the engine could be remotely stalled while moving, it would be horrifying.
No, it only requires them to fail to test that their device cannot be used to shut off an operating car. Stop and think -- what criteria define an "operating car"? It's not "the car is on" since it's entirely possible to stall out while moving. It's not "the car isn't moving" since that doesn't cover the stoplight situation. It would be trivially easy to code a device that would not permit the car to be restarted even if the car stopped in a dangerous situation.
This isn't as outlandish a thought as you imply, especially when it comes to vehicles and the sales practices around them. Also, someone could believe it's okay to stall a car at any time without even considering the ramifications in the case that it's moving. All they need to be thinking is "deadbeat owes me money, brick his car." Any questions of timing, context, ethics or other considerations needn't enter into the picture.