A sendup of the art establishment: Talk about easy targets!

Many years ago I saw a documentary about the artist Bruce Naumann, an eccentric minimalist, and I was convinced that there was no such person, that he was a hoax invented by fellow-artists, that his entire corpus and existence was a form of performance art (the term didn't exist then). Over the years, I've seen so many references to Naumann (even the name suggests No Man, right?), and I even have a book about him, that I've come to accept he's a real person - unless someone has been playing this real person for an entire lifetime. The film "Enter Through the Gift Shop" plays with that same concept - part documentary, part mockumentary, about a filmmaker named Thierry Guetta who sets out to document the work of street artists and becomes a successful street artist himself. The film is in itself a work of street art, in that the career of Guetta is clearly a fabrication and a sendup of the commercial success street artists and the gullibility of the art establishment and of the public. Okay, but unfortunately, it's not that funny a sendup and it's been done before. If Spinal Tap had not existed, never mind Best in Show et al., this would be a better movie, but it's hardly the kind of groundbreaking work of cinema you'd expect from the highly creative and brave and unconventional street artists - the real ones - whom we meet in the film. In fact, the documentary footage of the street artists is by far the highlight of Gift Shop, and I wished I'd watched a real full-length doc about their work, not this hybrid.