Three things.

[Ratburntro44]

But why can't you say that in normal chat...?

...Have you been on the game at all? I couldn't private message him and never saw him in a game or chat lobby again.

Still not getting you... why would you need to PM him?

[BrokenOne]

To speak about strategy/tactic or just the weather or movies. For me it would also be nice to whisper outside the game to people while staying in the main chat.

Im against whispering while playing though.. it would make alliance extremly overpowerd and would lead to a strict "no alliance or ban from my future rooms" policy while selfhosting.