I use modulators, front and rear. I keep it on low beam when modulating, as I want people to see me, not be overly annoyed. If I notice someone adjust their rear-view mirrors when I'm behind them, I turn it off, otherwise, it's always on in the daylight. I don't believe people actually fixate on a modulating light and drive into it. I DO notice people often waiting and not pulling out in front of me when the modulator is on, perhaps trying to determine if I am an LEO...whatever, as long as they aren't pulling out in front of me, it's fine with me. Mine is legal in 50 states.