edit/rewrite: i was gonna saying somthing in more detail but to put simply i still am hung up onhorrid nightmares of GR chat.
basically its 10x more work for moderators and it would have to be constantly moderated or become a cespit which isn't ideal. unless we have a bunch of moderators with nothing to do i don't think its practical. almost forgot what i was gonna add to this post orignally.
one more factor people would have to use it, coh2.org has a mumble it is not heavily used yes i could see why this might be used more but at the same time probably less because its nto nearly as convient as a shoutbox which is why people use it.