You will find that totally blind people often shout, they can also be a bit brash and outspoken. They don't mean to be but this is the way a lot of them are. If you put yourself in their shoes, sometimes they think they are not being noticed unless they shout. Have known many who do this, they can also be very outspoken and abrupt. Darnell just grates on me, mostly because of the accent and anyone who sits there and listens to Alex talking about her "gangster" friends without even picking up on it has to be a bit simple.