The Day of the Triffids/Fridge

Fridge Logic

 * You'd think there would be far more sighted people who missed seeing the lights in the sky/meteor shower. For example: people sleeping from night shifts, or using the metros, or even visiting casinos or nightclubs.
 * Aside from the people sleeping off night shifts, all those people would have had to exit out into the night at some point or another. Certainly, places like Brisbane (which doesn't have a subway system) would have copped it badly, and it goes on for an insanely long time (and appears to be unhindered by cloudy skies).
 * The original book mentions in passing that one area is now being run by coal miners who were, in fact, down working when the shower hit, while the first movie version has a gang of former prisoners menace the heroes.
 * In the original book, it is mentioned that the lights are seen even in broad daylight, and all the radios are constantly talking about the event, so it would have been weird for someone to actually miss it.