I'd also be very careful about not bringing mites home to your snake. I'd throw the clothes into the washer immediately, and wash thoroughly. I'd hate for their problem to turn into a problem for you. Just remember if you purchase a snake from a place, you are promoting their practice. They will just turn around and replace it with another animal. You can't be responsible for every animal, but if you feel the neglect is bad enough report it to the local authority. Write letters to the store, and maybe direct them information sources.