Rutslegolas: Like Imladris said, it's not 
required that they leave a reason or a name, but it's definitly better to do so. You might as well let them know what you think they need to work on, & leave your name in case they have any questions about it. I'd like to think no one on here would use the name left on a negative rating so they could rate that person negativly back. (I'd like to think that made sense, but the jury's out 

)