Got an unusual name? Facebook may think it's fake

NEW YORK -- Alicia Istanbul woke up one recent Wednesday to find herself locked out of the Facebook account she opened in 2007, one Facebook suddenly deemed fake.

The stay-at-home mom was cut off not only from her 330 friends, including many she had no other way of contacting, but also from the pages she had set up for the jewelry design business she runs from her Atlanta-area home.

Although Istanbul understands why Facebook insists on having real people behind real names for every account, she wonders why the online hangout didn't simply ask before acting.

"They should at least give you a warning, or at least give you the benefit of the doubt," she said. "I was on it all day. I had built my entire social network around it. That's what Facebook wants you to do."

Facebook's effort to purge its site of fake accounts, in the process knocking out some real people with unusual names, marks yet another challenge for the 5-year-old social network.

As Facebook becomes a bigger part of the lives of its more than 200 million users, the Palo Alto, Calif.-based company is finding that the huge diversity and the vast size of its audience are making it increasingly difficult to enforce rules it set when its membership was smaller and more homogenous.

Having grown from a closed network available only to college students to a global social hub used by multiple generations, Facebook has worked over the years to shape its guidelines and features to fit its changing audience. But requiring people to sign up under their real name is part of what makes Facebook Facebook.

To make sure people can't set up accounts with fake names, the site has a long, constantly updated "blacklist" of names that people can't use.

Those could either be ones that sound fake, like Batman, or names tied to current events, like Susan Boyle. While there are dozens of Susan Boyles on Facebook already, people who tried to sign up with that name after the 47-year-old woman became an unlikely singing sensation had more difficulty doing so.