The guy in my group yesterday who felt the need to call out EVERY SINGLE TARGET through the entire game...
"Attack this one!" "This one said something about your mother... All your mothers!" And so on... It was incredibly annoying. Thanks so much for calling out every single thing you decide to attack buddy. I'm pretty sure I could have figured out which mob to attack without your brilliant insight...Then he made some smart ass remark when I hit the health font after round 2 even though we didn't "need" it... Like we need to save it for later for some reason or we would actually bother to run back to it if someone needed a heal... What an imbecile 
Was this on PS3? Because I was playing with a friend of mine last night trying to help him level up and 2 pugs dropped in the lobby with mics. One of them started talking about how in the last match he did, he was calling out enemies and mobs and got kick votes from it. iirc, he said something about leaving the lobby when it was just a Legionnaire left and the 2 Archers that were in the match were dead, not to mention it was at zone 5 vs. demons.
On topic: Speaking of those pugs, they kept thinking that the pedestals for protected chests where still in-game and that the shortcut rooms could be protected too. It was pretty annoying for me.