Have you ever wanted to fuck around in pubs with a lot of other people? Have you ever wanted to do it in a CO-ORDINATED FASHION? Yes you have.
Now with co-ordinated public assaults you can use a mumble that's empty 99% of the time to gather your posse and assault public servers.
Feel free to use the group to archive hilarious things said by pub players as well.
p.s. invite all your friends