"Should the applicants decide to apply again, they must make appointments using our on-line appointment system."
- Debra Heien, chief of the consular section for the U.S. in Nigeria
Three West African bushmen recruited to build an authentic mud-hut village at the Frontier Culture Museum of Virginia were denied visas because they are too poor and inarticulate. Consulate officials noted that the bushmen (who were recruited specifically for their knowledge of how to build traditional native mud housing) could not demonstrate a bank account and e-mail address, mortgage, or lease agreement that would demonstrate residence in Western terms, and they could reapply using the consulate's web page.
I'm guessing they're probably not heavy web users. But who knows.