I think the most interesting part is this:
Michael Zimmer, a doctoral candidate and blogger at New York University, said that ''social network" sites like MySpace, which measure popularity by the number of page views or friends within a social network, may unintentionally contribute to the problem.
''The desire to fabricate content to attract people's attention is a possible result," Zimmer said, ''like a 6-year-old who exaggerates about something on the playground to impress and gain friends."
Furthermore, the relative anonymity of blogs ''may create both protection from being found out, as well as a form of escapism from their actual life experiences."
I still find my plagiarist's actions mostly incomprehensible, but that was a good observation.