Wikipedia
Mark's teacher told the class wikipedia was not an acceptable source. But Mark didn't want to spend time researching his paper. He found a few Wikipedia articles and invented a fake bibliography. When he got his paper back his teacher had given him an F. It turns out his teacher had posted fake wikipedia with made up info.
It turns out his teacher had posted fake wikipedia with made up info. But Mark didn't want to spend time researching his paper. Mark's teacher told the class wikipedia was not an acceptable source. He found a few Wikipedia articles and invented a fake bibliography. When he got his paper back his teacher had given him an F.