For Christs Sake
If you play a mission which requires coordination use a mike!
I can understand you don't want to talk or listen to morons during races or free roam but when you are in a mission were one player needs to snipe and the other needs to assault a defended rooftop, it sure help if players can talk.
Additionnaly - don't attack a chopper when your health is in the red! wait untill its back green
I hate it when people don't seem to understand a game