People that drive with their rear fog lights on. In the last year, there have been maybe 3 days when rear fog lights would be beneficial. Yet about a quarter of BMWs and Audis have them on day and night.
The main problem is that because they are an optional light in NZ, most people haven't the slightest flipping clue about when you should use them. Best case I've seen is on one of those highway cop TV shows, the cop they were following for the day had his fog lights on on a sunny day, he probably should've read
this.