A multibillion-dollar business has grown up around "gray charges" - extra credit card charges for products and services consumers never wanted or meant to sign up for. Some experts say these charges are deceptive and misleading, if not illegal.
http://www.nbcnews.com/id/52612529/ns/business-personal_finance/t/how-avoid-gray-charges-credit-card-bills/#.Ufqc85Im3KA