No. You cannot watch World War Z. I have not seen it myself, and while I still have a hankering for a good and scary zombie fix, you will not be watching it. I distinctly remember your elder brother and father coming home from the theater the night they saw it. Your brother slept with his light on for a week and your father had to watch sitcoms for an hour before being able to fall asleep.
But if that is not enough to convince you, I give you more evidence of why you will not be allowed to watch this movie:
1.) World War Z is rated PG-13 and you, my son, are 10. And no, I don’t care if every single one of your friends have seen it, or even if every 10 year-old in the country has seen it.
2.) Let’s reflect on the Possessed Panda incident.
Remember that poor panda bear? First, after you determined that it had moved on it’s own, you banished it to the depths of the basement. But that was after beating it to death with a bat and shooting it with your BB gun. And then, just to make sure, you piled stuff on top of it.
But was that the end of poor Mister Panda bear? Oh no. You were certain it was going to resurrect itself, so you carried it to the curb and put a “Free” sign on it. And only when it was gone from the street corner was your world safe again.
Zombies? I. Think. Not.
3.) Let us also reflect on the Night of All the Monster Banishing.
We turned on every light in that basement. We checked closets and windows. I even made sure the grate over your window was still bolted to the house. It was.
So while you state that all those things were in the past (and by past, you mean a month ago) and you could totally handle a creepy Zombie movie, I am not willing to bet my sleep on it.
When you are all grown up, and able to go on Monster hunts alone, then you can watch World War Z.
P.S. Your brother made you something.