Ehhh.... if my low beams are on, my "fog" lights pretty much are too. But if you look at the little pic of my car in the avatar at left it's obvious that "fog" lights on the Stang are fairly misnamed. they are as large and at the same height as the main lights. At night the amount of additional illumination from the "fog" lights is significant. Since I didn't opt for the HID option, they are a valuable aid to my nighttime navigation and give me a much better field of view. I do occaisionally get people who flash their brights at me thinking I have on my high beams, but I'd bet that's simply because they see 4 headlights instead of 2. I've passed many mustangs with the fogs on, and any car with an HID is more annoying for glare. Heck, the wife's Cooper is blinding comparatively.
Keith - the idea of polarizing the headlights and the windows at angle s is pretty dam cool, but when light reflects off a surface (like a wet road) it is polarized in a different way. I wonder how that would affect the effectiveness? We should test that....