Well after watching the recent cutscenes in MW2 where the Shadow Company gets stitched up yet again by Konni (spoiler alert). I feel really bad for Warren, because it seems like he's getting type cast as the fool who takes everything at face value lately, and I just would like to give him a big hug if I can.
Yup in Modern Warfare 3, he's likely listening to Boiler by Limp Bizkit, after finding out the Konni mercenaries stole the chemical weapons from under his nose and killed more of his comrades in the process. Lamenting on how much of an idiot he is for trusting in Shepherd, whilst he's questioning the validity of his own existence.
if you're jeff and you read shauna's journals... wouldn't you mention something about the pregnancy of a kid that's been MIA for the last 25 years?? umm hello?