Superstition is defined as "unreasonable awe or fear of something unknown, mysterious or imaginary, especially in connection with religion", or "religious belief or practice founded on fear or ignorance" (Shorter Oxford English Dictionary). I find Buddhism to be nothing like that. It is possible that in some cultures, superstitions from an earlier belief system, for example, animism, could have been retained and became part of the new practice due to ignorance of the practitioners. But serious practitioners of Buddhism, whatever tradition they may belong to, should be able to differentiate between superstition and Buddhism. They should study the Buddha's teachings carefully and remove all traces of superstition from their practice.