Think of it as a Facebook group for your smartphone — except you're not tied to your real identity and you're not limited to your Facebook friends or friends of friends.
Rooms is designed to connect you with new people around all kinds of topics, including sensitive ones such as health issues, sex tips and personal finance.
Miller said at the time he was joining the giant social network with the goal of building Branch at Facebook scale.
With Rooms, people can be as public or as private as they want.
"A close perusal of media stories suggests that online molesters have not changed their tactics as a result of the advent of social networking sites," according to a report from the University of New Hampshire's Internet Solution for Kids, Inc.
that will be published in the February/March issue of American Psychologist.
People who create rooms can choose everything about them, from the colors used to the cover photos.
Rooms is the latest mobile app to emerge from Facebook's Creative Labs.
The goal is for people to use the name or nickname that makes them feel the most comfortable discussing the topic, Miller said.
They can use different pseudonyms in different rooms, but they have to use the same one in a specific room, Miller said."There is a good reason in a lot of situations why you don't want people to know who you are and it's not because of something sketchy," Miller said.
The study relies on data collected between 20, including interviews with teenage Internet users as well as federal, state and local law enforcement officials.
"Between June and October 2007, we conducted over 400 interviews with police about Internet-related sex crimes and we have yet to find cases of sex offenders stalking and abducting minors on the basis of information posted on social networking sites," report authors said.