The Internet allows individuals or companies to communicate with a large audience without spending a lot of time, effort, or money. Anyone can reach tens of thousands of people by building an Internet web site, posting a message on an online bulletin board, entering a discussion in a live "chat" room, or sending mass e-mails. It's easy for fraudsters to make their messages look real and credible. But it's nearly impossible for investors to tell the difference between fact and fiction.