When you form an Ops group if anyone anywhere has out or takes out their companion the game starts spamming messages nonstop in the chat boxes and across the middle of the screen.
A picture is worth a thousand companion messages...
Turning off all game notifications doesn't work, having members store their companions doesn't work. I was getting up to 100 messages per minute, making ops/party/guild chat, tells, etc spammed away constantly. If not for voice chat I would have had no way to receive messages from my group.