Yeah, I tend to ignore the factually incorrect and mod up the responses.
If I have 15 mod points I'll usually only use 2-3 of them to mod down, and that's normally people spamming, being genuinely hateful or unnecessarily trolling.
As an example, genuinely hateful would be using racial slurs in an aggressive and demeaning manner to insult or attack someone. On the flipside, discussing racial characteristics - even if unpopular or wrong - to try and make a point or discuss through an issue is something I'll avoid modding down, although I may mod up a response.
In action? I wont mod down, "black people are less intelligent than white people." I will mod up the reply, "All academic studies suggesting that's the case have identifiable flaws, particularly around how they measure intelligence." I will mod down "Fucking niggers are thick."
What are my personal views on relative racial intelligence? Doesn't fucking matter.