Not sarcastic.

Yes, persuade people they are wrong where they are wrong; learn from them where they are right (we are all fallible). Persuade other people that they are wrong; teach other people where they are right. Plus an unlimited number of other possible responses.

>I can try to persuade them that they're wrong

That assumes you know what their ideas are. If present trends against free speech continue, it's not a luxury you're necessarily going to have.