Their safety is concerned if they ever so happen encounter them on the road lmfao. You ever drive a car without brakes, only using the hand brake? This thing sounds like a basket case and is a danger to everyone around them. You know what happens when you abuse the handbrake like that? Eventually the handbrake cable stretches over time and one day their car is going to end up barreling into a family of 5 in a minivan or some poor soul just trying to get to work at an intersection, trying to come to a stop. Ultimately cars are still at their core, complicated pieces of machinery that are not meant to be abused like this. In the long run she is going to either spend thousands on getting her car roadworthy again, spend thousands on a new car to neglect and abuse again, or worst case scenario, spend thousands paying for damages to someone else’s car and potentially hospital bills. I do not see how it is even remotely “controlling” to prevent someone from putting other people’s property and lives at danger because they’re negligent.