Considering your lack of response to questions and unwillingness to acknowledge serious issues with the perp in this case (the former Sgt) I for one am finding little reason to give your opinion and experience much weight
I would also note that as a motorcycle rider, damn few cagers use their turn signals, regardless of age. Also the senior citizen drivers IME pose the highest risks to those of us on motorcycles, followed closely by soccer moms with kids in the car.
Hey , my 84 yo father always uses his turn signals ... even when he's not makinga turn