I have found the same problem in a popular spot down here...girls stopped in the bike lane to text...REALLY... or the girl on the mountain bike that pushes you into traffic when you pass. I believe that ignorance is bliss, she has almost never ridden with a group and never in a good cycling area with other riders, I'm sure she doesn't know what "on your left" means. It's gonna take one guy behind her in a car that lays on his horn. She has no clue...I wish that with every bike that is sold there was some kind of "safe riding" manual to give people a clue!