This will depend on what you refer to as "evil".
Answer 1 (evil defined as harming others): Wicca is a belief system, a religion. It's most basic tenent, "Harm none, do what you Will", is similar the Christian Golden rule, "do unto others as you would have done to you".
ReligiousTolerance org has excellent information about Wicca that is easily understandable for the non-Wiccan public.
Answer 2 (evil defined as following Satan): Satan, the devil, Lucifer; whatever you call him is a Christian belief and has nothing to do with Wicca or its beliefs. Some satanists do use magic for power, but they are Satanists not Wiccans. A real Wiccan uses their power for protection, healing, good fortune, divination, etc. None of those are evil.
Answer 3 (evil defined as religious intolerance): Wicca is not evil at all. Basically the biggest belief is that you can do what you want as long as you don't hurt anyone or anything. (It is worded differently but that is today's translation.) Second of all, WE DON'T BELIEVE IN SATAN SO WE CAN'T WORSHIP HIM! Christians teach that all witchcraft in any way is bad and evil and that includes Wicca. Just to let you know, some Wiccans don't even practice magick. That is DEFINITELY NOT to say that it is bad though. It is just another part of what we do. It is like a form of prayer. Just because we are different doesn't mean we are bad! Some Christians also argue that they suffered more than Wiccans did. I am not about to say that the whole crucification thing was not absolutely terrible in EVERY way. I don't care what you did. You should not be put to death in that way, and if it was just because of your religion then it is even worse!!! I agree completely that it was stupid what happened to Christians, but any "Wiccan" that would do something like that is not a true Wiccan because they won't follow the first rule. "Do as you wish, but harm none." Plus, it wasn't only Wiccans that did that. Also, notice that Christians, as well as others. burned anyone even thought to be a witch at the stake. That also was as stupid as stupid can be. We are also (at least most of us) are very accepting of other religions.
I also want you to know, that I realize that like any religion in the world, Wicca has a few problems. There are always the extremists that think that everyone different than themselves are stupid. Those people should not represent their religion until they change. It also has some problems with the actual religion. I can't think of anything off of the top of my head, but there definitely are a few things, just like every religion everywhere.
I personally am a Wiccan and I do not worship or even believe in Satan, I try and urge other people to try to be kind and gentle towards any other living creature, and I do spells, meditate and talk to our goddess and occasionally our god, but I also do things that any other girl my age would do, talking on the phone, playing on the computer, talking about boys, having sleepovers, occasionally getting sucked into gossip, flirting, trying to get a date, making small unimportant problems into a dramatic event that I have to go cry on my friends shoulders and get hugs about, going to school, listening to music, and MUCH more. I'm a normal person with a religion that is a bit different. I can't share that with almost anyone that I know for fear of losing friends, having friends being forbidden to hang out with me, or of being shunned. I still celebrate things like Christmas with my family. I am very accepting of others, and I am not very different from most other Wiccans. Please just don't be prejudiced against Wiccans because of things you hear from extreme Wiccans that sound like psychos, or from extreme Christians or other prejudiced people. Please don't be prejudiced against other religions either though.
No, Wiccans worship the Earth Mother, a natural Goddess who has been worshipped since humans first evolved. Demons are evil - the Goddess is loving and good.
Most put it under satanism, or witchcraft. But it's not bad at all. If they were to look into it they might actually understand that most wiccans are good, not evil.
No, Satan is an entity in the Christian faith. Wicca predates Christianity. The idea of wiccans of witchs being associated with Satan or black magick comes from a certain group of wiccans who wanted to change the religion into how they wanted it. The magick they performed was very dark, this made it alot more noticeable. So from one group it spread to more evil people wanting to perform black magic. Soon the christians saw all wiccans as evil and burnt any to death. This is why witches/wiccans are seemed as evil. I added a comment below, read it please.
You can do any spell you wish; however, most wiccans are into good/white magick.
The word "wicca" means wisdom. Women who had knowledge of medicine and other practical matters used to be seen as a threat to the Church and to the power of men in general. Therefore, they were called witches (or wiccans) and persecuted. The prejudice against people who practice a nature-based type of religion lives on today because of ignorance. Wicca is a peaceful religion. Wiccans are not evil.
It feels good
There is no such thing as "good evil." Evil is the opposite of good.
I can't speak for other Wiccans, but I personally think it is a book of myths like many others, with lessons and stories. It can be very good for teaching, but cannot be taken as literal fact.
Cinnamon has many properties and Wiccans who are trained will utilize various herbs, such as cinnamon to create and cast spells of power, healing, health, and various other spells. Cinnamon is also good for the heart, and is good for keeping ants out of the house.
I'm one, so yes, there are Wiccans in the world.
Yes, there is evil witchcraft, contrary to what Wiccans may claim. Satanists practice witchcraft too.
AREN helps Wiccans realize their true potential in conjuring spells. It allows Wiccans a sort of guide to different spells and such that they may utilize.