I dont believe in any forms of superstition or bad luck, or any form of luck for that matter. If you walk under a ladder, you will not have bad luck. This is comon sense. Life is all chance (as I refer to it). If you win the lottery or if your parents die, its not because your lucky/unlucky, or cursed/blessed. Its just part of life.
So to answer your question, I do not believe in superstitions