The
Community Faq will answer all of your questions.
But if you somehow can't get anything out of the community faq I'll tell you...
Dragon points can be earned by: -posting intelligent messages -giving useful feedback -helping out people -giving good advice -taking someone's (avatar, signature, cutout) request -submitting nice fanart Dragon points..: -can rank you up
-once your warrior or higher you get a lot of previleges
Skull Points can be given for:
-flaming
-spam
-posting something unnecessary
Skull points...:
-is a warning
-can get you temporary/permanently banned
I hope this answers your question