hv any body tried for any sidhhi? any type of black magic?

In life there will always be ups and downs. Suppose a good person finds that he has lost lot of money, people attribute his failure in business is due to someone who is opposing him has used Tantra (maya and Mata). Commoners believe it. If a bad man fails in his life, people say that because of his bad deeds, god has taught him a lesson. The actual facts will be different.
From the child hood days I never believe in such foolish thinking. If such a thing is possible, everyone knows that bin laden is a murderer, why cannot these tantrics use the mantra and kill him? One should develop scientific temperment and not indulge in such superstitutions and beliefs.