I look at current driver assistance systems as human-robot hybrid. Any driver assistance system should be required to be clear in it's intentions to the driver and give time to react, otherwise it's like a wild horse.
People who don't read manuals put themselves at risk.
Even simple systems like Cruise Control carry plenty of warnings that one should be familiar with when operating (from Ford's manual):
WARNING: Always pay close attention to changing road conditions when using adaptive cruise control. The system does not replace attentive driving. Failing to pay attention to the road may result in a crash, serious injury or death. WARNING: Adaptive cruise control may not detect stationary or slow moving vehicles below 6 mph (10 km/h). WARNING: Do not use adaptive cruise control on winding roads, in heavy traffic or when the road surface is slippery. This could result in loss of vehicle control, serious injury or death. [and few more, shortened for brevity]