What's funnier (or sadder) still is that people couldn't see it for the joke it is. I cannot take seriously anyone who jumps to denigrate the poster in such mean terms. Shows a certain ignorance and the 'reviewer' should be congratulated on flushing the eejits out.
I agree: it's quite witty (I also like the "How UPS Deliveries Work" video to which there's a link on the page).
On the other hand, it would be hard to underestimate some people's intelligence. I recently saw a review on Amazon of a battery. The reviewer gave it one star because, although it was exactly what he'd ordered and there was nothing wrong with it, it didn't fit the gadget he wanted to power.
Jeremy