Facebook is considering allowing preteens to use the social-networking service under parental supervision. The possibility has heated up the debate over privacy and safety in the Internet age. The highly charged debate over privacy and safety in the Internet age picked up steam this week as word leaked that Facebook was considering allowing kids younger than 13 to use the service with parental supervision. Among the options the company is exploring: connecting kids' accounts to their parents' accounts and giving Mom and Dad control over what their children can do on the site, such as who they can "friend" and what apps they can use. "We have to do something super responsible. We can't afford not to," said a person at Facebook familiar with the situation who was not authorized to speak publicly. "We are tiptoeing into it."