I ended up writing, too. I'm surprised at the amount of anger this has made me feel. The complete lack of feeling she displays, and the completely erroneous reasoning she employs, just leaves me speechless. This is what I said:

Your post on Craig's List left me angry and speechless. I can't believe you would reward your dog for 5 years of love by giving her away. Her fur will NOT hurt your baby. Don't you realize that MANY parents with babies have dogs? The opportunity to grow up with an animal is one of the best things you can do for your child.

Despite how I fell about your post, I don't think you should remove it. I am confident that your dog will do much better in a home where her owners will appreciate her more than you apparently do.