We don't usually do evil when there's no benefit to doing evil.
I didn't know what it meant. It was just glowy and fun and it felt like Christmas.
Madness string 2836
There seems to be this underlying expectation that the players are largely a bunch of simple-minded, morally righteous but extremely violent thugs who are willing to believe just about anything put in front of them and never question whether a fight was necessary or avoidable or what it says about them that they chose to kill everyone hostile yet again once things got a bit tense.