I hope you are not one of those people who insists on running his fog lights constantly. For those of us of a certain age developing cataracts (but not enough to have surgery) the additional glare is most annoying at night. While they are supposed to be pointed low, they do just spray light out of the vehicle in many directions. Some vehicles are much worse than others.
It is just more light flooding the eyes of oncoming drivers when you run them, especially on city streets where there tend not to be too many Bambis. Seems like about 40% of the drivers around here in Denver keep them on all the time.