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I normally would agree with you - I'm very pro free speech - but what Alex Jones did was not just "the wrong words", it was blatant slander that permanently ruined the lives of these people. I understand why you're concerned, but we've had slander laws forever, and this is exactly what it's used for.
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Imagine losing your child in a mass shooting, and then having someone get up on their soapbox in front of a massive audience and, repeatedly, drum up outrage from their audience towards you. Why? Because they say that no kids were killed in that mass shooting. That it was bogus. Your child never existed, and you are a liar and a crisis actor.
The audience gets angry, hits you up on social media. Googles you, starts calling you. Some people start showing up at your house, harassing you at your place of work. You want it to stop, but this dude on his soapbox just keeps going, getting himself angrier about it, and his audience angrier. They keep calling. They keep hounding you in public. You change jobs, but they find you. You move, but they find you.
You lost your child, but you always - year after agonizing year - have people coming up to you and telling you that that's not true and that you're a horrible person. Grief is a hell of a thing to deal with, but society won't even let you properly fucking process your loss.
That is how their lives have been ruined.