I’ve never seen this in Australia. But my main gripe with motor/push bikes is a) People riding without any lights. b) People riding without sufficient lightly.
Re. b)If a bike comes up really close to the rear of your vehicle, and the rider has no reflective gear, the light can be obscured by your own vehicle.
Re. a) I’m not sure if this is some Aussie thing. Especially with push bikes. The number of people I’ve seen on the road at night with no lighting and zero reflective gear.
So as a relatively recent migrant to Aus, I find that odd because AFAICT the regulations here are more strict than back in the UK. I.E. you must wear a helmet, you must have lights after dark, your bike must have a certain configuration of reflectors (two in the wheel, back/front of each pedals, front and rear) etc.
From what I understand the reflector stuff is routinely ignored by 'the community' because it's outdated, rules out use of clipless setups etc.
But the lights ... no idea. It's really really bad idea to cycle on the road at night with no lights. I wouldn't want to risk it, and it's scary as a driver when all of a sudden there's this dark figure out of nowhere.
I've seem bicycles in London projecting a green bike emblem into the road about 5 meters ahead using a laser.
Two somewhat higher intensity spots on the road ahead would work as you indicate, At least in ideal road conditions.