Good and Evil are relative terms, and each means nothing without the other. It is the role of the Villain to compliment the lives of do-gooders and honest folk by creating that contrasting element that justifies their altruistic behavior, and gives their lives meaning. It is not an easy job, but it is a necessary one.
The first heroes made a name for themselves by fighting the troubles of the world: Wars, Natural Disaster, Foreigners etc. But technology has brought about a golden age for mankind, and the Internet has created a global culture that no one had thought possible. With the assistance of these superior beings, mankind eventually ran out of traditional problems. This is where costumed villains stepped in.
Villainy is different from crime. A Criminal is just a person who has broken laws. Anyone can be a criminal, and any criminal can be a repeat offender. No number of parking tickets will make an average man into a Villain. Criminals lack a history and culture that unifies them. They are generally just parasites, taking from the community and giving nothing in return but a cautionary tale. Criminals represent the failure of our education system to produce useful persons. A Villain is a criminal, but he is a completely different type of criminal, and is treated as such.
To be a successful Villain, you have to stand in opposition to the things that people and heroes hold dear. You have to deliberately make yourself a foil to the ideas and beliefs of the people or heroes you are targeting. If the ideas that you stand against are considered Good, then this is called being Evil.
When a Villain is successfully Evil, just and right-thinking persons, “Good” persons, will shudder when they hear your name. They will think of you, and be unable to think of a single redeeming quality. They will know you by the way you present yourself: your façade. Because you cannot actually be the opposite of everything considered good, a Villain uses showmanship and presentation to draw attention to the evils he commits, (like mutating the dogs at a puppy-orphanage), and distracts from the “good” things he does, like paying his henchmen on-time. This creates the façade of a villain who can do no good, yet has an army of loyal minions.