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, but she wonders why the online hangout didn't simply ask before acting.
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"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 -- which in the process is 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 homogeneous.
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.
Facebook spokesman Barry Schnitt acknowledged that Facebook does make mistakes on occasion, and he apologized for "any inconvenience." But he said situations like Istanbul's are very rare, and most accounts that are disabled for being fake really are.
"The vast, vast, vast majority of people we disable we never hear from again," he said. Because the exceptions are so rare, he said, prior notification is "not something we are doing right now."
Facebook is available in more than 40 languages -- and growing -- and its user base is larger than Brazil's population.
But financially it is still a startup.
Because Facebook has only about 850 employees worldwide, getting complaints answered can take a long time. Istanbul, whose father is from the city of Istanbul in Turkey, said it took three weeks to get her account reinstated.
"I think they just assume you can't have an interesting name," she said of Facebook. "I kept my maiden name because it's such an interesting name, I didn't want to give it up. And now I am having to defend my name."
The suspension of Robin Kills The Enemy's account inspired a friend to create the group "Facebook: don't discriminate against Native surnames!!!" on the site. The group has more than 3,200 members, including some with Native last names who've had their account disabled.
"If you deal with this kind of thing all the time, and on top of that Facebook wants you to prove your identity, ... it's adding insult to injury," said Nancy Kelsey, a graduate student at the University of Nebraska in Lincoln, who started the Facebook group. She said Facebook should remedy the problem so that it "wouldn't be so offensive" each time a real name is deemed fake.
"Native American surnames mean something," she said. "They are points of pride, points of identity. It's not someone trying to make up a fake name."
Unlike many other social networks, Facebook wants a real name behind each person's account. Bands, brands and businesses are supposed to use fan pages and groups; regular accounts are for real people.
Facebook says its "real name culture" is one of the site's founding principles. It creates "accountability and, ultimately, creates a safer and more trusted environment for all of our users," Schnitt said. "We require people to be who they are."
Once the site disables an account it deems fake, its holder has to contact Facebook to prove it is real. In some cases, the company may require that the person fax a copy of a government-issued ID, which Facebook says it destroys as soon as the account is verified.
Yet an informal search on Facebook shows that efforts to weed out fake names may be a Sisyphean task. A recent search for "stupid," for example, turned up more than 27 people matches, most looking dubious at best. They join some 20 "I.P. Freely" accounts and 13 "Seymour Butts."
Steve Jones, professor of communications at the University of Illinois at Chicago, said having real people behind personal accounts helps Facebook maintain credibility.
"If they let fake names and accounts proliferate people are going to take it less seriously," he said.
Still, he believes that Facebook should notify the holders of purportedly fake accounts.
"The first step in any sort of takedown action is to notify," he said. "What's the rush? Why not give somebody 24, 48 hours?"