I hate it when people drive around with their front fog lights on. It DOES annoy me whether it is oncoming cars or a car behind me. They are for use in (heavy) fog or falling snow. That’s it. Turn them off at all other times.
The worst is when a car just has their sidelights and fog lights on and thinks it looks good. It doesn’t and it’s dangerous as oncoming cars may have difficulty judging how far away your car is.
Some people refer to them as “spotlights”. Since there is no requirement for a car to “spot” objects in the sky or at sea manufacturers do not install spotlights. They are fog lights, for use during fog etc. It’s that simple.
I think that everyone knows that rear fog lights should only be used in heavy fog. I don’t think that people who leave them on are rude, I think that are just really stupid.