Good Deed for Today

So I am standing on O'Connell Street, this afternoon, and I see a blind man who is not looking too comfortable with the idea of getting across the road. So I see the opportunity for my good deed for the day and seize upon it. So take him across O'Connell Street and when we arrive at Henry Street, I say to him: 'Ok then take care' to no reply whatsoever. Who said just because you are blind, you also have to be courteous?