There are already so many medical and behavioral issues that result from poor breeding, inbreeding and crossbreeding inbred and overbred dogs that cause heartbreak and suffering to people and pets alike, that now adding hairless creates new risks and compounds old ones.
A dogs' natural hair coat helps regulate his or her temperature. The hair keeps the dog warm in the winter and cool in the summer. The skin of a hairless dog can become sunburned, can become cracked and infected if too dry and can be easily injured or scratched.
We have got to stop creating a demand for designer dogs. Until we do the unscrupulous breeders and con artists will make more, and more, and more. How much harm are we willing to inflict on our dogs?