The adults seem to be compliant around these parts but of course there is always the youngsters around that do exactly the same as we did saving the cost of lights or batteries to be aware of, it terrifies me the thought of hitting a cyclist due to the disparity of masses and zero protection and I fully understand your lady giving up driving.
Our village Bobby used to creep up on us all on his silent but deadly LE Velocette and give us all an earful from time to time.