It depends on my mood... if I catch myself feeling surly towards other drivers I take a breath and back off. Of course if there's a safe clear spot I'll pass them but I'd rather hang back than take a rock.
We get a lot of fast-lane pace cars going 55 in a 60 or the cruise control passer going 61 who passes a guy going 60 and that takes forever... and a special hell is reserved for that guy who hangs traffic at 45 mph in the fast lane up for 5 miles because he's going to turn someday.
Not everyone is as intelligent and canny behind the wheel as me, so I have to forgive them their ignorance and boorish road manners. Once they are in my rear view mirror!