Cheap Blow
This note actually says more about the person who wrote it than the person it was intended to. Hellen Keller was a famous author and activist and the first deaf-blind person to earn a Bachelor of Arts. Basically, the person who tagged this car is saying the driver can’t see for squat.
She is highly respected person in her field, and Pennsylvania even has a “Helen Keller Day” where people celebrate her monumental accomplishments. This is a low-blow to Ms. Keller. Still, but it’s also a pretty hilarious insult.