[Skatche]

The problem with an evil kingdom is that most roleplayers do now and probably always will equate random PKers with non-RPers. Although maybe if you tried a lawful evil kingdom rather than chaotic evil...

For those who are not familiar with D&D-style alignments:

Alignments consist of two parts - the good/evil and lawful/chaotic. Good characters follow a very Christian set of morals, while evil ones do not. Lawful characters believe strongly in order and laws, while chaotic ones believe there is no order in the universe.

So, chaotic evil characters would be randomly killing things, backstabbing, cheating, and generally being very psychopathic. Lawful evil characters, on the other hand, although they are only out to further themselves, would always follow the law, to the letter. They would however exploit any and every loophole they could find in their favour, and would not be particularly merciful when dealing with people who are indebted to them (think of Shylock from Merchant of Venice).