Eh, that stuff doesn't bother me, and it was probably needed to inject some energy into the picture. It doesn't really feel forced. The biggest problem is the main character's arc, or complete lack thereof. It was little surprise to me, because I was given fair warning by some peers who saw the picture before it was released - but it still raised eyebrows.
The guy is a total dick the entire picture and then his heart melts once he hears the soldiers are going to kill Christopher? Really? It's that kind of stuff, relatively easy-to-fix screenplay issues, that bother me the most. Because of instead of settling for just being entertaining, it could've been a really great film.
The film really struggles with attempting to develop characters, on both sides, that you can root for. Even the aliens are overplayed as mindless, violent animals early on.
Oh well, I guess Blomkamp(sp?) will have his shot to correct some of those issues in three years.