Poorly designed systems can cause people to become bad actors despite their best intentions.
Imagine a narrow hallway that has doors opening into it, The hallway is so narrow that opening a door pretty much blocks the whole hallway, and the doors have no windows so you can't see who's in the hall before you open them. You can be the nicest person in the world with the best of intentions, but if you use those doors often enough, you are gonna hit someone in the face.
Not a subtoot, incidentally, just a tangent from conversation elsewhere. Mostly talking about software here. :)