In my past I have taken a few track driving courses, and one of the things they teach you is if you are coming to an incident try not to look at it too much as your brain will naturally steer you where you are looking (the motorcyclist look 'through' the corner scenario).

Anyway when I see a car with DRL it tends to draw my attention to it, I would have seen it if it didn't have DRL, just now it is distracting me from cars without DRL, also as I am spending more time looking at it I am sure my brain will steer me towards it (or maybe that is just my evil side wanting to ram them to turn the DRL off )