It's not just block and move on though, I can't find the article that explains a study of it. If the person is a simple troll, then yeah, do it that way. But if they're a nuanced, giving false info, and sound convincing troll, give one response and then stop engaging and downvote. That gives a person who doesn't understand that the troll is full of bs a counterpoint to at least not take it as fact. It's a counter to the "get there first" strategy of trolling.

You have to stop though, if you're explaining then everyone is losing.