1) Cars that drive round at night without any lights on. WTF? Police will stop cars for executing a U-turn when the road is safe and clear in both directions, but seem not to give a damn about a tonne or two of metal speeding along with no illumination.
2) Cars that only have one headlight or brake light working. See above re. lack of police action.
3) Pupils that are otherwise incredibly polite, but do not turn up for a lesson, meaning their teacher either wastes an hour walking to and from the office, or needlessly spends money on a taxi.
4) Pointless lists on blogs 😉