Last Wiccan post
Just read it
Except this symbol is used by a large number of people who don't necessarily have common beliefs, because this symbol is used in many different religions, like Wicca (representing the four elements plus spirit at the top), Satanism (though it is normally upside down, it's still the same shape and represents spirit below physical, thus why it is upside down), and even Christianity (where it represents the five wounds of Christ)!
Plus, some witches may use it in a way that is not religious at all. They may or may not follow any of the beliefs this picture talks about. It can represent the same things it represents, and it's also known to be a protective symbol. Those witches may cast curses, if they want to.
So basically, the entire text of this picture applies only to Wiccans and not the countless others who use it in a different way, and perhaps not even to all Wiccans, as some believe that there is a time and a place for curses, and not all of them believe that sending out evil sends evil back to you.
Reference: spells-and-chants.blogspot.com