Emphatically agree here.
Generally, I try to see the good in people, consider their perspective, and find common ground wherever possible, even in lolcows. But no matter how

that is, there are just some people in the world who care for nothing but their own interests, and will burn anything and anyone in their way. Melinda is such a person. She has demonstrated time and again that she has no interest in truth, fairness, or the well-being of any single human being on Earth but herself. Whatever the reasons, it doesn't mean everyone else is beholden to tolerate her.
The single biggest problem with trying to reason with someone like her is, you cannot apply common sense or reason where there is none. If you think what she's doing is pointlessly destructive, incomprehensibly stupid, and catastrophically selfish, then you are mostly sane. She is not. There is no applying reason to a hurricane, it simply is a hurricane. She doesn't listen to anyone because she literally cannot do so. It simply isn't in her wiring to process anything anyone else says as anything other than a grievous offense to her worldview and self. Even though I'm trying to be as clinically bland as possible in saying this, she would take it as a personal attack. She literally can't read it any other way.
Society is neither expected nor required to accept the consequences of the dangerously insane. Sooner or later, she will end up in a legal quagmire she can't climb out of. Being crazy doesn't absolve her actions, nor change the damages they cause. She wants to hurt people, sees nothing wrong with hurting people, and no amount of talking will ever change her course. The absolute best outcome of such efforts is, nothing changes. The worst, you're empowering her to hurt others further, and deeper.
Stop trying to convince a hurricane to be a meadow. You're only going to end up frustrated and angry.