I'm not too sure about that. My name is in orange, and I've had my share of terrible comments.
I'm honestly not too sure what the orange adds to the mix. Personally, I think it would be more useful to have the score displayed in the user's profile. I tend to check a person's profile if I think they're new and here to troll; that would help verify or disprove that (for me at least).
It intuitively highlights for me low-scoring comments that I may want to read.