tarrangar
Fat arctic chicken
If we send the challenge at the start of the war, well if Robert accept it and loses, suddenly he's no longer king of the Seven kingdoms, and so Stannis is not dutybound to take his side.Pointless pandering to our enemy.
What exactly are we supposed to achieve with that, except alienating all those people who are loyal to us and have suffered for it under his rule?
And if he indeed survive and get sent to the Wall, the Wall can use all the PCs it can get.