No no, wait, let me guess:
-They "trained" by making and using their own Doom levels... (which explain why they are such excellent fighters)
-When you go to Yahoo.com, the things they have been searching for turn up as "Brittney Spears nude","Linkin Park mp3s", "type r sticker", and "bullet proof bong"
-They had a pirated copy of Photoshop on it
... that they used to draw stick figures with beards stabbing guys named "USA prezadant"
-They have a wall hack cheat for CounterStrike. (Really doesn't matter, all they do is activate a grenade in their hands and run in to the enemy base anyway.)