"The Call of Duty franchise has fast established itself as the quintessential hardcore multiplayer online experience alongside Bungie's hugely popular Halo series. And while there's an undoubted satisfaction to be gained from mastering the intricacies of the myriad weapon and perk combos, from learning each map inside out and from developing a thick enough skin to deal with Xbox Live, there's also a huge amount of fun to be had in 'griefing'.
You see, Call of Duty players - and I consider myself in this group having played it obsessively for so long - take their games very seriously. They'll constantly compare their accuracies, forever look to increase their kill to death ratios and do whatever it takes to get to the top of that leaderboard and be on the winning team. All of which makes them absolutely ripe for winding up, disrupting their strategies and generally making a game of annoying them instead of playing the game proper."