If you believe that wearing your baseball hat inside-out is going to help you keep your home run streak going, then you also have to believe the Easter Bunny is going to be in the outfield to catch the ball.
With that being said and based on observations from my own life, I know that some things can be manifested through extreme belief and focused concentration.
I suppose if believing in superstition allows for the person to manifest their own string of luck, I don’t see anything necessarily wrong with it. (But then again, depending on your belief system, neither you nor the hat will determine the outcome of your actions.)
And sorry… the only future throwing salt over your shoulder ensures is that you’ll have a mess to sweep up later.