Yeah, if I start to flee, the first button I click is the kill prisoners one.

I rarely kill my Prisoners unless I am super rich and they have more numbers in their armies than I. They fought with honor and honestly, I agree with the treaty in todays society on how to treat prisoners. I however, will not risk my kingdom on an idea. As far as Rebellions; Rebel against them, all goes home - Rebel against me, all must die.