I'm not criticizing the reviewer, just saying he has a different perspective than I. I want a motorist approaching from the rear to be attentive of my presence. I want to redirect their focus and include me in the field of view. The reviewer considers a blinking/flashing light to be an annoyance and dangerous (including daytime) to some extent because the driver should be focusing on other possible hazards. I consider the approaching driver a potential hazard.