War of the Worlds pg-13

We rented War of the Worlds (Tom Cruise) over the weekend, it was PG-13 and thought my 10 year old son who likes Halo/2 could handle the aliens blowing up the world stuff. I saw the original movie and read the book. However, what really threw us for a loop was the way the producers/directors/writers decided to paint the earth red with human blood and use our body parts to grow some sort of root system. No explanation given and some other things in that movie just didn't make any sense but I don't want to talk about how bad the movie was. WTF? Human blood fertilzer,?! How could that type of violence or idea not be R rated? They showed a man getting pinned to the earth and a huge long spike/tube kill him, although the actual act was hidden behind a car. wtf? I don't mind R rated movies and I won't let me son watch them but please use some common sense in the ratings. I mentioned Halo for a reason. The game will show tiny splashes of blood when the body is struck by bullet or melee but it's not gory. I just bought Quake 4 and it's opening scene shows gored marines free floating in space, you see brains, guts, missing appendages, torsos. That's a Mature game in comparison to Halo which also rates a Mature. I don't want everything rated mature because trying to cover this as a black and white, Mature or Disney category isn't accurate either.

Inconsistencies made the movie really hard to enjoy....

How did the son survive and get back home? They threw that in because they were trying to make it a happy ending even though millions were killed and everyone would be living in the bronze age for a few generations before anything was rebuilt.

Why the hell was Tivo mentioned in the movie? I hate stupid pathetic obvious product placements like that. It ruins any credibility the movie might have had in that scene.

Why were the ships buried in the earth? If they were there for a long time, how did they know to put them under cities? It raises more questions that can't be answered, Just bring them down from space, why did they have to make those changes ot the story?

Why was that crazy guy in the basement of the house and flag them down but no one else who was running around?

A plane hits your house but a decrative plate stays up on the wall? I would think it should have fell like the big airplane outside that must have ran out of fuel because the plane was not burnt.

How did the video camera still work in the beginning of the movie when the electromagnetic pulses fried anything electronic around? Oh, and changing solonoids wouldn't have fixed the car because the spare solonoids would have been fried too.

I'm just venting.