Every established author and even aspiring writers know they must create good baddies in order to make their novel a bestseller and have readers turning pages super fast. Create good 'Baddies' when you start building fictional characters for your novel with agro bullies, nasty bastards and dangerous bitches. Three-dimensional, credible bad guys create essential story complications, personalize conflict, add immediacy to a story line. http://ihubbub.com/magazine/creating-fictional-villians
In the end, if there were no "bad guys" in a story, the heroes would never choose to rise up. Who is Aladdin without Jafar? Or Peter Pan without Captain Hook? We should thank the villains because without them, there would be no heroes.