One: Please, don't make your roleplay responses look like a script! Paragraphs and / or sentences are preferred.
Two: Keep all canon characters in character, please! Batman wouldn't go on a murder spree, and Harley Quinn wouldn't suddenly snap out of her insanity.
Three: You can have as many original characters as you want, but only one canon character each.
Four: Bullying or harrasment of any sort will not be tolerated. Please report this immediately.
Five: Don't make a huge fuss over whether or not the character you'd like to play is taken or not. Make an original, or choose another existing character.