I just came across this video on YouTube: http://www.youtube.com/watch?v=jeIHH0XEs6E
I suggest you watch it if you can stand the way the guy talks. He has some pretty smart (although semantic things to say).
Basically, he is drawing this line of reasoning: Many video games include detailed, realistic depictions of firearms. I have never played Medal of Honor but I believe you can choose an AR 15 platform (right down to the brand) and accessories any way you want.
Well, in order to cast these replicas, they actually have to buy licenses from the companies. These licenses put money in the hands of gun makers. Therefore, for a person who is rabidly anti-gun and thinks we should not support the gun industry, is it hypocrital for them to buy video games such as Call of Duty and Battlefield?
A very interesting line of reasoning I think.