Eh, depends on the comment. I recently saw a particularly erroneous comment about COVID-19, so I checked the poster's comment history to see whether it was worth trying to engage them in good faith, or just post a dry correction for others to see. I then saw this comment posted earlier that day:
> I don’t know if it’s blacks in general that are just retarded or if it’s balcks coupled with the history of slavery that makes them so useless and violent, either way I think this country would be VASTLY better off without them.
...I think it's pretty fair to label them based off of that one comment. For content that abhorrent, any number of occurrences above zero is enough to tell what kind of person a user is.