Had a BMW 325 Coupe in front of me on the M1 that had his rear fogs on, the sun was still setting so they weren't hectic, but I'm pretty sure dude had no idea they are on.
Just OT:
Does anyone find it weird when people drive during the day with their main beams on? It's understandable if you drive with your dims on during the day especially if your car doesn't have DLRs, but I'm seeing many simply turning their main beam along with foglights on, looking like idiots, especially those who have cars like more recent BMWs that gave DLRs. I've seen so many BMW 3series that have both the DLRs and main beam on at 2pm in the afternoon, it's such a waste, and you find that their BMW's headlights end up blowing sooner than they should, I've seen countless Beemers with only one xenon headlamp working due to the smarty who drives it running mainbeams all day everyday. It's something I mainly see on BMWs.