Also think about 1,000 player talking in same room, man i am hardly able to read my linkshell on peek time while i am farming and even more when i am doing hard event, just imagine try read 100x more spam.
It's not a chat channel, it would be strictly for shout type announcements with 1-2 minute delays before you can type anything again. The whole point of it is for people to use it to form/join groups for seals, NM kills or XP alliance groups.