After reading many posts online about the movie "Exit Through the Gift Shop," I feel so darn gullible. It seems that the whole movie is a ruse, a farce, a big hoax. Mr. Brainwash appears to be one of two things: A) the artist Banksy himself... or B) a character created by Banksy and the artist Shepard Fairey. It is all explained adroitly here by someone named John Shorney (much downward scrolling might have to be done one you visit the link).
And I obtusely bought the whole thing... hook, line, and sinker.