How about /shsv (Shout server wide) commnad where it's completely invisible on your normal screen and it's only visible on a new tab?

There are currently like 6-7 tabs? Normal, says, tells, shouts, party, linkshell, ???, profit

Why not make one of these tabs one that can only be viewed if you actually toggle through them? This sounds rather simpler to me, how easy/difficult is it to implement for devs is beyond me.