Lol! I didn't take it as a challenge, rest assured. To solve the problem of people doing things that may interfere, and/or cause unhappiness, in the lives of other people (and here I'm referring to more than just irritating folks), we already have the solution: It's called law enforcement. AAMOF, even when people irritate us, like noisy neighbors, harassing ex-spouses, etc., the law does give us ways to restore our inner peace, if we're willing to pursue the same.
I only wrote what I did, in response to your op, because there are those whose happiness may come at the expense of others. An extreme example would be the serial killer who derives his/her happiness by murdering other people. We certainly DON'T want to let these types of people "do what they need to do to make them(selves) happy."