I was playing Silent Hill and Resident Evil when I was five, and I turned out alright. I don't think CoD is going to corrupt him too much.
There's stuff much, much worse just on TV.
I was playing GTA Vice City when I was 7, and I didn't turn out completely messed up.
I was playing GTA Vice City when I was 7, and I didn't turn out completely messed up.
Obligatory Caveat: Human mental development normally ends around age 24. It is therefore impossible to determine if you are "messed up" or not until you reach that age. For all you know, you could be 100% messed up and you wouldn't even know it.