I've seen it more than once, and the last time I was in a car with my family. I said "Salmon! Salmon! Salmon!" and pointed out to my kids how dangerous that was.
Whenever I've mentioned it to people, I've had a lot of people say, "That's what we were taught, to ride against traffic." I know that can't be right, or else someone giving this instruction was horribly mistaken. I wonder if they mistook being told to walk against traffic for riding a bike against traffic.