I generally agree with Bob on this on with some minor and personally contridiction. One, I give the best sci-fi movie of the year to the director's cut of Watchmen. I will grant District 9 is presented very plausible. It is after all shot in a mockumentary style. This lends to a sense of realism. Watchmen though is an anti-hero superhero movie. I know if I met Dr. M I would be shitting myself over the thought I would not want to say something to piss him off. That's just me though.
Two, while D9 is a marvel; it does have some contridictions in it. The main point is their ship ran out of the fuel needed to leave Earth, still has the power to levitate in Earth's gravity well (and atmosphere) while not falling in orbit from space (the only place an object its size could survive if it actually ran out of fuel. Gravitational pull is an accelerated force and if it could hover, it could escape), and the alien's only find enough fuel to jumpstart the ship after digging in their own Earth bound refuse searching for their own tech to extract fuel 20 years after they through it in the garbage...on Earth. Perhaps nitpicky, sure I concede that.
Sure I will absolutley agree or state that the special effects (CGI) were blended perfectly in District 9, more so than Watchmen. The story parallel about how we treat each other is smart. But so was Watchmen's. Bob mentions the violence; watch the Director's cut when Rochaque takes out that kiddie molester. That...was violent and hard to watch. It went on for a minute. Not the three seconds in the theater.
It is not lost on me overall that Bob never used Watchmen as one of the comparison movies in D9 review. Then again Watchmen was a "hero" movie and D9 is more classically sci-fi.
P.S. I watched GIJoe inpart from your review, Star Trek was better IMO, not that mine means much.