Well, the problem is that you commit the offence if you actually cause soemone to be injured, interrupted or endangered. So, shooting at night may result in less of a risk through fewer people being around to be injured, interrupted or endangered but if you do then you are guilty.
It's a ridiculous clause. If you are 51 feet from the centre of a highway and you injure, interrupt or endager someone then you don't commit the offence. If you are 49 feet away and it's a foot path and someone is injured, interrupted or endangered then you don't commit the offence. Bizzare, to say the least!