I received the following PM (name removed):
i remmember that you were changing the wikia on some old stuf and things that doesnt show.
i have 1
a nidbane not always execute you. confirmed
I've not done enough with nidbanes to know the details well enough to put my name to such a change. I'm pretty sure they don't kill 100% of the time and it depends on the crime they were summoned for, but not sure enough. If anyone else is willing to share specifics or data on it, you can PM me or post here. (I will add it to the talk page so it is visible as something that needs further investigation.)
Opinions expressed in this statement are the authors alone and in no way reflect on the game development values of the actual developers.