Purple Diamond chat spam, Help!

Okay, I have made decent efforts to find a solution to this online and I have had no luck.
So! I have a chat group running today that has never popped up before. It has not taken over and bumped all of my trade and general channels like I have read.
This channel begins with a Purple raid diamond; then (0); then player name; then text.
This channel seems to be people searching for raid groups.
While this may be a convience to some people I would greatly appreciate it to stop. If I want to look for a raid using oqueue, I will open oqueue.
This channel is spamming so much I can't even read trade chat because it's so broken up (not that I would want to read much of that either!) but it's annoying me.
If someone knows a simple solution that would be AWESOME