Most drivers don`t even know what front foglights are for and how to correctly use them, even some on here I bet :D
The idea is that when your headlights start to shine back at you in the fog making them useless and dangerous, you turn them off and slooooowwwww right down, because now it`s dangerous! Your fogs are meant to light up the road immediately in front of you so you can now see well enough to drive safely. Most folk I see just turn everything on and think that enables them to drive safer and faster!
Rear fogs are obviously to be used in thick fog and certainly not when it`s raining, that should be a fine and 3 points IMO.
;)