Do you have young World of Warcraft players under your roof? Perhaps it would be a good idea to give your credit card statements a quick look. BillGuard, a service that helps consumers find and deal with fraudulent credit-card charges, has listed the Blizzard MMORPG as one of the top 10 sources of questionable transactions. Apparently a player can pay for their subscription using a service known as PaymentOne PhoneBill, which simply requires them to enter their telephone information on the site. According to BillGuard, “Given the young age and lack of credit card availability to some of [the game’s] users, this option has a high potential for unwanted and unauthorized purchases by young family members.” Blizzard did not immediately respond to MSNBC’s request for comment about their story. If you’re surprised to see “Blizzard Ent Wow Sub” on your bill, then you might want to have a chat with your young warriors.