That's assuming that people are arguing in good faith though. When 100 other people have rationally debunked them already and they still say the same series of falsehoods and gish gallop onto the next one when you point out its incorrect in the same way those other 100 people already have I don't see what benefit there is in engaging with them.

Some people argue about things to win an argument, not uncover the truth, engaging with them as if they are doing the former when they're really doing the latter will get nowhere.