I am about half way through the 2nd prestige now. Last night I got the scar title with the skulls for getting 2500 kills with it
I was playing against some dude that was through every prestige last night? Obviously he cheated to get there somehow, cuz that dude was horrible.
As for the annoying 13 YO singing in the mic, don't they have a mute button on the PC? On the 360 you can mute any person you want to, which usually turns into me muting 3/4 of the room