Who cares? These folks just wan't to drive the little brown vans. They don't need a CDL for that.
Depends on how little the brown vans are. Frankly, I expect to see larger trucks that do require a CDL rather than UPS going through the expense of increased liability insurance rates. Whether deaf drivers are more or less accident prone isn't as much a problem as is the tort costs associated with an accident. That and the communications barrier that would occur between a deaf driver and a customer.