Rather than wait for a hot wheel bearing detector to go off, maybe Norfolk ought to think proactive and conduct preventative inspection and maintenance on their bearings, like changing them out or lubricating them on an proper time/mile schedule. It’s not complicated, each numbered car should have a computerized maintenance record, including time and miles between scheduled inspections and maintenance.
Hot bearings have been a problem since the beginning of railroads.
The problem has been reduced to near zero. The railroads are not as ignorant as you make them out. there are maintenance efforts that exceed your notions