Oh really? So no one would have any interest in using information about another person’s personal tastes for any other purpose than making money? No one would consider defamation or mudslinging? No one would seek to use a person’s private interests against their public or social image?
You don’t have to be a politician who plays World of Warcraft to have people try to drag your personal life and interests into public scrutiny for some ulterior motive. A closeted homosexual might have their life thrown into turmoil being outted by some slimeball with an RFID scanner who catches them lingering at a yaoi panel. “Why would anyone want to do that?” you may ask. Any number of reasons. Personal rivalry, professional rivalry, random malice, political agendas…