I have been playing Mafia Wars for some time and actually purchased $7.00 in credit a few months ago. I did not realize that Zynga had automatically saved my credit card information or that anyone who clicks any "buy" button while playing any Zynga game in the future could easily rack up charges against my credit card. To make a long story short, my granddaughters (ages 7 and 8) began playing "Petville" on my computer; when I returned, I saw three "receipts" in my e-mail and found that they had charged a total of... read full review »