Ah god, perhaps I better jump in and give my 2c worth...
The main reason there are no actually evil players in the game currently, is because of the lack of game dynamics to support them. This is the exact reason Dues Ex disbanded, and why the "Moving to Rubies of Evertide" thing came up: There are no mechanics in the game to actually do anything evil. DeT firmly believed that Evil should come from actions first and firstmost, and that talking should then come from that, in certain situations. The guild was formed because of a perceived lack of evil players who actually did anything- you can only talk up evil to a point, and after that, it just becomes tiresome.
There are currently very few, if any, legitimate ways to conduct evil actions in planeshift. ANYTHING borderline, or for that matter in some cases anything 'evil', will be instantly reported to GM's and in a large majority of cases will result in punishment for the evil players. 90% of 'roleplayers' in PS don't understand that just because someone attacks them IC, it DOESNT mean they are attacking them OOC, or that they are 'griefing', or breaking the rules.
Hence, there is no way to legitmatly conduct evil actions, and even when you talk evil, players more often then not take it personally as an OOC attack and will still report you.
Hence, there is very limited scope to be evil, and this is the reason why DeT (And I'm guessing other evil guilds) are in permanent hibernation. The old Evil players haven't left- we're just waiting for the developers to add something in that we can do. That is, assuming they ever do- It's largely looking like the game will never support any real Player versus Player action (In terms of attacking, theiving, etc), because "We dont want griefers and its too hard to come up with a system that will work well so lets just not focus on it for now". I'm of the firm opinion that this will lead away from what could have been a very exciting and dynamic community, but really, once people have their minds set on their way of doing things, you cant stop them.
In the past, every attempt to create an evil atmosphere has been defeated and labelled unwanted by the community and the developers. The only realisitc mechanisms to conduct any evil actions currently are borderline on abusing bugs, and would require great investment of time and organisation. We are not prepared to do this for a community that would not appreciate it, as shown before. I hope, one day, (Sooner rather than later), the developers will realise that having a Good vs Evil aspect in the game with both sides player controlled would greatly help interest and excitment in the game if properly implemented, and they will do something about it. Until then, we have better things to do with our lives then to fight a lost cause.