Alrighty. I'm going to say here what I've been saying for a long while.
We can't fight this, at all. No matter what we do, what we attempt to do... there will always be an abundance of killers and psychopaths. Why, do you ask?
Well, first of all, this is a game. In this game, people get to do what they don't normally do in real life. In real life, you can't stab someone without having consequences. Here... you die and within 5 minutes you are back to life, ready and raring to go. People enjoy doing what they cannot do.
Second, people may complain about the overabundance of killers and whatnot, but think about it. How often do people 'die' on this server? (I'm talking about leaving the server, or perma-killing). How many cataclysmic events happen so very often? How many of this psyche shattering things occur here? This isn't going to not affect your character. I tried to be absolutely normal with so many of my characters. 2 got brainwashed, and 1 got pushed into a war and saw all his friends die around him. (The other is happily skipping around Abresi, but we shall ignore him. No one cares about Tomas). This is going to harden people, make them more likely to kill or 'snap'.
So, it is a deadly circle. We start with a lot of villains and evil events, which lead to more villains as terrible things happen, which leads to more evil events... and more villains (you get the point).
So, let's live and let live... and try to be considerate OOC. Let's not just go around murdering for the fun of it, right? Do your best to make fun as a villain... and as a victim.