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The so called "Perk Glitch" or the "glitch" that when you rank up
and unlock a new perk, you pull your Ethernet cable out, etc and you get all the rest of the perks doesn't work.
It's was made up by some jackass who wants you to sit there pulling your cable out as soon as you rank up hoping you'll get all the perks :S
You seriously think infinity ward are that stupid?