Shouting "fire" in a crowded theater — where there is no fire — isn't considered free speech. On the Internet, the rules aren't as clear.
Some experts believe online expression should be unrestricted, but others say a medium with a memory needs some limits.
Daniel Solove, author of The Future of Reputation: Gossip, Rumor, and Privacy On The Internet, and professor at The George Washington University Law School
Nicole Wong, deputy general counsel for Google