I know my vision isn’t the best. I wear my glasses, I moderate my speed if I have trouble seeing in night. I drive with my lights on at all time – daytime running lights are required by law in Denmark.
But I really don’t think I’m blind enough to ignore fog. It’s usually quite obvious when it’s foggy – or there’s heavy rain, dust or snow. If it’s serious, the right reaction is to turn on your fog lamps. Of course, turn them off again in city traffic, since they tend to produce a lot of glare.
Seriously. Turn them off. If there isn’t any fog, heavy rain, dust or snow – turn them off! I don’t care if they look good on your car, they’re bloody annoying, and anyone running them at night without need are bloody idiots.