LAW 36, The 48 Laws Of Power, Robert Greene - DISDAIN THINGS YOU CANNOT HAVE : IGNORING THEM IS THE BEST REVENGE.
By acknowledgiing a petty problem you give it existence and credibility. The more attention you pay an enemy, the stronger you make him; and a small mistake is often made worse and more visible when you try to fix it. I it is sometimes best to leave things alone. if there is something you want, but cannot have, show contempt for it. The less interest you reveal, the more superior you seem.