User blog comment:Conqueror of all Zombies/How you know if you've played too much CoD?/@comment-24476373-20100630061010

When you listen to parodies of songs- the CoD version.

When you spam the spetsnaz dude saying, "ENEMY AC130 ABOVE!!!!!!!" over and over again into your mic while on CoD.

When you stay up till 2:30 in the morning using the computer, on the CoD wiki.