Facebook may 'lock in' its Internet dominance

LOS ANGELES: College senior Alyssa Ravasio gave up MySpace on the day she got a Facebook account and never looked back. She has already lost interest in Twitter. But how does Facebook know it can keep her loyalty?

The brief history of the Internet is littered with the ghosts of websites that people have abandoned in their relentless pursuit of something newer, faster, better and cooler.

Tech-savvy Ravasio, a 21-year-old UCLA student designing her undergraduate degree around the Internet's impact on society and communication, is irked by changes privately owned Facebook has made.