We had a 20 something young lady last fall who was walking at night, in the rain, wearing her I-Pod headphones with a hoodie pulled over her head, and strolled right around the activated warning gates, lights and bells and into the path of an oncoming light rail train.
There is nothing you can do for someone like that.
Hoods can be dangerous, too. They act like blinders making it difficult to see on either side of you. Some designs are much worse than others.