It is my understanding that in wicca there are certain beliefs regarding something called the three fold return.. They do have a thing about trinitys...maiden, Mother Crone etc.

The three fold return as i understand it is something to do with whatever you intent or put out returns thrice as potent..Wiccans, If my memory has not escaped me again, place great stock in the expression "An it harms no one"

So i'd tentatively suggest that spells and hexes designed to inflict in some way are not ordibarily wiccan in origin.

That aside, Get yourself a dark stone of some sort ..Obsian..Coal. Jet, Black Tourmaline, Nuummite, Onyx or just a Black Pebble...Because these are thought to soak up negativity.. Then Once its full up with negativity, through it away in a stream/River/Ocean (which will cleanse it) Or cleanse it yourself for use when next some ill intent comes your way.