I didn't hear any complaining, but I mute everyone who speaks anyway, since I can rarely understand what is being said with the network latency and accents in play. :P
Heh, it's not as if anyone actually uses text or voice communication for anything relevant in games anyways. Generally I've been ignored when I try to do that, well except when I'm actually playing with decent people in L4D/L4D2/TF2.
I can imagine that person complaining about hax but that's probably from being an old hand at counter-strike waaaaaaay back in the day. :P
I'm assuming there's less whining like that in CoD, especially if it's a console version.