NO. That might as well be Harry Potter nonsense. Your energy and your own belief system will dictate the outcome of all your magick.
Cursing and healing. Left hand path and right hand path. Black and white. Desiring and repelling. They are all part of the same circle. All interlocking forms of spiritual, magickal, and transformational work. Human energies in the spiritual, coming into the material world through perfectly natural means.
Separating magick into right versus wrong, black versus white, evil versus good, is not only a narrow-minded task, but it narrows your scope of universal understanding and the greater reality. You, as a Witch, are a force of nature. Nature is not all sunsets and flowers. Nature can be cruel, as it can be kind and nurturing.
Nothing and no one is judging you but you. As long as you are comfortable and confident with your ritual work, proceed in peace. Learn to love yourself, stand up for yourself, protect the vulnerable (especially animals and children!), and know that you are a limitless being.
Love & Magick,