People are allowed to be wrong. If you want to do something about that, the thing to do (on this site) is to respectfully provide correct information.
I don't know what you mean by "confronted", but usually people have in mind something like the online callout/shaming culture. We don't want that there. Snark, name-calling, flaming, putdowns, and so on, are against the HN guidelines. They're also not in your interest, because (a) they don't persuade, and (b) they discredit your view in the eyes of neutral observers.