Yeah I had this happen a few times lately. Sometimes if I'm in the right mood (and I have an open opposing lane) I keep the gas down and pass them I pass people on solid lines if I deem them dangerous
(swerving, going off the road, going too slow... wearing pink hats... etc.)
Or if you're really pissed off pass them nicely and once you're in front slow down to 10 below the limit.