Intelligent people ignore...Yes. Let it go, and move on with your life. Then amazingly one day you realize you haven't thought about that negative situation, or that jealous, vindictive person in like forever, and you think, "WOW!! What was her name.
I did not happen to learn this a long time ago, only a few months ago. Give it some thought. Turns out to be true. They are not entitled and they will think what they want anyway.