It's not a nitpick so much as wondering what's going on in district 9, but why the fuck did MNU put aliens in shanty towns and were about to try for concentration camps? No successful government or organization is that stupid, and they are called Mulit-National United. We do know that they're a hive society, and the leader caste of the ship was presumably killed off, so in my opinion the only way we'd have the balls to try that would be with a interstellar backer (Considering prawn weaponry...). What they were getting out of the deal is anyone's guess, considering they hadn't made any progress with the alien tech in 20 years and how utterly outmatched they were by it, along with their backers letting the aliens get away to come back in three years with reinforcements.
To be honest, this smells like a cold war proxy battle to me, which would make sense given the nature of interstellar WMD's, but to be so amazingly sloppy that any alien worth his salt, namely, Christopher, could come to the conclusion i have is a mystery, or possibly a setup. Perhaps they want them to lash out at we primitives to make a point. Who the hell knows. Throw in the idea that he was considering making the next movie a prequel, and the next movies going to be interesting whatever happens.