I have no problem with fog lights used in accordance with the highway code:
You MUST use headlights when visibility is seriously reduced, generally when you cannot see for more than 100 metres (328 feet). You may also use front or rear fog lights but you MUST switch them off when visibility improves (see Rule 236).
The sad thing is, most motorists switch their fog lights on at the slightest hint of fog or rain, or even darkness, when vis. is still 1/2 a mile or more, and then leave them on. In this case they are counter productive, especially as they are normally now integrated into the light cluster with the brake lights rather than separated horizontally and vertically from them.
I use them on the occasions when it is so poor that I am worried about someone coming up behind me and not seeing my tail lights in time and I turn them off when someone is established behind me at a safe distance and speed, so they notice my brake lights. I certainly haven't used the rear fogs on the Omega since I've had it (a year) so this doesn't happen that often.
I don't see it as a problem to turn them on and off as required. We do the same with the main beams and indicators, after all.
To answer cem, our traffic lights are always active, day and night. I hate to think what would happen if they weren't.

Kevin