Cannot control whether people are mature or not.
The emotes are in the game, and some will use them.

I don't really see a point in using /spit.

I know, running with the RathStrat guys, we generally steam-roll alliance.
But the best games by far, are those where the other side is coordinated.
On a typical night, there are 2-3 in the same battleground on our side.
But in games I play there are anywhere from 0 to 20 other toons who are boxed.

Guild runs, have been entirely boxed, but that's not RathStrat.
It might be rather similar to RathStrat, but generally not exactly the same.
Particularly when you have 25 toons boxed, and 15 pugs doing their own thing.