Count me in as an idiot then!
Although my van has daytime running lights as per Canadian law, I have my headlights and foglights on at all times when driving. Why, you ask? Safety. I want to be as visible as possible, and if that annoys people with a very low threshold of tolerance, too bad! As for annoying others, very soon after I got the van, I drove my 280z ahead of my wife in the van at night, and the foglights were not annoying at all. And you're not going to find any car where you sit lower than that. And yes, foglights do help when there is no fog. They help light up the ditches at night, useful when there are deer, coyotes, raccoons, dogs, kids, etc around here. As for blinding others, true foglights, when installed properly, cast a horizontal beam, no higher than the light itself, so they should not blind anyone. If this bothers you, it's time to get your blood pressure checked, UTA!