Here at SXSW, I just met with with Frank Abagnale Jr., the real-life check forger turned FBI security expert played by Leonardo DiCaprio in “Catch Me If You Can.” Frank warned me and CNN’s Ali Velshi, “I have nothing against those social media sites… [but] don’t give away pertinent information that you know people can take to become you.”

Then Ali turned to me and asked, “What’s the balance here… Because we want free stuff on the Internet, so we know we gotta give some information about us. There’s companies that use it, sell it to advertisers.” I took a moment to break things down and explain how you make a compromise with your personal information whenever you get something for free online. Check the video below to learn more about these little digital footprints we leave behind when we’re on the web: