How smart can these aliens be?

Rating: 6/10 (1 July 2005)

THIS CONTAINS SPOLERS PPL, YOU HAVE BEEN WARNED!
Hey guys
I watched the movie yesterday in Cyprus, and I was not expecting something like this. I was a bit disappointed with this movie. Graphics were great, fx n all. Acting was good at times! (ill get into that later) but it was more the story and how it was laid out. I don't know if its just me but I was quite annoyed at the movie for the first half an hour or so (which mind you could have been Spielberg's intention, I don't know) but that little girl in the first 30 mins was the worst little brat I have even seen on screen! And not to mention that piercing screaming that came from within this girl AGH heheh! I was rooting for the tripod things at that time! :)
Anyways this is my main point, the narrator (Morgan Freeman) introduces the story, as its zooming in and out of that water droplet showing all the bacteria and all. Now I'm not quite sure at which part they say this, was it Freeman or someone else during the movie, but they state that the aliens have been preparing this from eons ago, before man and intelligent life or such walked the earth, and that they have been studying our every move, analysing us like we were under a microscope and so on, so...
HOW THE HELL DID THEY MISS THE FACT THAT OUR WORLD IS STRICKEN WITH ALL FORMS OF DISEASE VIRUSES AND BACTERIA!!!
I mean come on! talk about being lazy at a your job, you have a million years to get something right and they don't look into their food source and our blood streams (hehe firstly my friends and I thought it could have been from people with AIDS) And also just a little note about the layout of the movie, it was family moments for 5 mins and then killing and running for the rest of the time and then 5 mins before the end, the death of the creatures and a 3 second explanation as for the reason for their demise! I didn't like that much.
so yeah that's my point i guess, pls feel free to correct me with what I've said, because I know I have it when ppl talk crap, so by all means comment