It's a pretty big deal in high-level sports, too. Ask Jose Canseco (the baseball player who most famously used steroids), Bill Belichick (the infamous American

It's a pretty big deal in high-level sports, too. Ask Jose Canseco (the baseball player who most famously used steroids), Bill Belichick (the infamous American football locker-room videotaper), and He Kexin (the almost-certainly-underage Chinese gymnast from 2008).