Because what modern mystic hasn't entertained the thought of messing with someone's chi out of revenge? Or you could just get your Feng Shui so on fleek that you're thumbing your nose at every naysayer and ill-wisher. Most importantly, learn to recognize Feng Shui taboos so they can't be inflicted on you--or so you don't accidentally inflict it on yourself!
Unfortunately (and somewhat comically) I've learned many of these by accidentally doing it to myself. Learn from Aunt Minnie's mistakes!