Answer:
Yes, we are real. No we are not green with warts, nor do we cackle. you don't have to do Wicca to be a witch.
Wicca is more spiritual. though you do have to believe in god, heaven that sort of thing for a spell to work. there are three kinds of witches white, grey and black. Black is out of the question (it's bad witches). grey witches are neutral. and white witches do magic to help others. I'm a grey witch. in order to be a witch you have to study witchcraft. kinda like school but it pays off.
A Pagan Perspective
Yes, witches exist. We are not the people you see in movies, or on TV, nor are we much like what you find written in fiction.
Most of us are ordinary people of all walks of life, all age groups, all races, and both genders.
Ours is an earth-centered spiritual path and the practice of magic is just one small part of it all.
Magic is the manipulation of naturally occurring energies and powers by the hand and will of a practitioner. Magic does not have a polarity (it is neither good or bad, it just is).
As witches are first and foremost people and people by their very nature are not perfect, the best any of us can hope for is that the magic used is used by an ethical practitioner. Therefore, white/grey/black/purple/any other color (polarity) magic does not exist.
In our study, of our spiritual path (magic included) we learn of the Three-fold Law, which states, "That which you send out will return to you three fold." This widely held belief helps us to make the choices as to how we will use our power.
Ultimately it comes down to taking responsibility for your own actions.