It is especially the case, that in poor visibility many drivers are using hazard lights. On dark unlit highways, in fog, the road ahead can turn into a virtual DISCO!
It is then impossible to see vehicles indicating to change lanes or identify vehicles which are stationary.
The problem is compounded by trucks and buses which have yellow hazard lights connected to their braking system.
They should not be used to supplement braking lights which are already high intensity steady red. People should not be using them as they approach pedestrian crossings to let pedestrians cross and they should not be used on highways except in an emergency.
A Hazard light should only have one purpose – that is to highlight STATIONARY HAZARDS.