Why were the aliens spending so much time attacking rural areas with one or two houses, but left Boston completly untouched?
With subways, and water mains, and such things, why did no one in the world ever find one of the buried ships?
How in the world did Robbie (the son) survive? He ran right into the explosions and death. Not to mention, how the heck did he get to his mom's house in Boston that fast?
You would think such intelligent beings would have the sense to wear a helmet on a foreign planet. Seriously, how did they not know about bacteria? (yeah, I know it was in the book, it's still dumb)
If the aliens made their plants with some sort of human blood fertilizer... wouldn't logic lead us to believe that such vegetation should already exist on the planet... you know, with dead people and all.