In order to best ensure her safety, Isabel should only give out her full name and favorite foods. The more personal information she gives out the more she is putting herself at risk of someone stealing her identity, online predators being able to locate her, stalkers, people misusing her information and so forth. You need to take care when you are using online social media sites especially young people which is why it's not always a good idea to give out your age if you are under 18.
