Are the outboard DRL only on HID units?
Fog lights - you may as well turn em on and enjoy....With DRLs, proper use of fogs is impossible. In thick fog, you're supposed to drive with them and no other headlamp. You can't see $hit out the front anyway, so the fog lights light up the side of the road so you can keep from driving into the ditch. BTW, you're supposed to go slow...duh. Without being able to switch the DRLs off, you get a high beam (low power) glare.
At least in Toronto area, nasty thick fog is pretty rare.