I see it every day, and even more at night: people with fog lights on when it's a day (or night) with fair weather, and no snow rain or FOG.
But people still drive with the fog lights ON.
The problem is that about 50% of them are aimed badly, and it shines at an oncoming driver. Some are extremely bright, and blinds the oncoming driver!
In Ohio where I am, it's definitely illegal to use them, unless the weather conditions require it, but people still turn them, or leave them, ON. I'll bet the "salesman" (obviously an expert driver) recommended to young people that it's a "safety" advantage to sell automobiles, and they tell it to everybody else, who ignorantly accept it. Isn't that what DRL (Daytime Running Lights) are for- safety?
All you really need is your headlamps, properly maintained.