I live in the New Territories and it is not unusual to see cyclists on the road dressed in dark clothes with no lights- at dawn, dusk or in the dark. They can be all but invisible at times.
Idiots.
A big knowledge gap exist between cyclists and drivers here. I would think many cyclists are not drivers and the majority of drivers have never cycled on the road. The cyclists encourage cars to pass, do not maintain a steady line, over-exert themselves on hills and drift etc. Drivers pass too close and do not seem to view slowing down as the primary option when approaching an obstacle (cyclist) in the road. They buzz past the cyclists or even more worryingly swing into the approaching traffic in the opposite lane.