It is more than welcome. Some people don't like it, but hey, we don't like them. Advice, well. Be nice OOC, and as mean as you want IC. They can't stop you as long as you don't do the whole "You'er mothers a wh*re" And junk like that. Also, try to find a guild that is evil aligned.
Dark empire -
http://hydlaa.com/smf/index.php?topic=15005.0Culmi Navarre -
http://hydlaa.com/smf/index.php?topic=25784.0 I post those two because well, one, the Dark Empire rocks (I say this out of personal experience) And because the Culmi Navarre is my guild

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Anyway, don't be put down by goodies who don't like evil RP. That's one thing PS needs. Heck, bug em more if they don't like it. Evil RP is not being stupid and killing stuff, it's about well...err...Just that negative goal in you mind. You can be polite, nice, and friendly, but in the back of your mind want to control all of Yliakum and make everyone your slaves. Sangwa is a perfect example of that. And few are actually evil. Create a backstory. Like my char, in his mind he is delivering justice to those who were wronged by people claiming to be good. Maybe it seems evil to the receiving end, but to him, he's Good aligned. So if you have that depth in your evil rp, please do keep it up.