If it were obvious from a single example, it wouldn't work. The goal of bad faith discussion is to make the other party engage in good faith, and they won't do that unless they think you're also acting in good faith. Once they're engaging, you can do things like waste loads of their time (it takes much less time to spout some dumb bullshit than explain why it's dumb bullshit), persuade bystanders that you're right by arguing with more logical fallacies and unreliable sources than they can point out, and make it look like they're being unreasonable by sealioning.