While I dislike those who purposely make their diesels smoke because it causes bad public perception of diesels, I have a similar disdain for those who purposely blast their loud music without respect to those around them. I have done something similar to what Adam did by moving up just enough to where my exhaust is right at their window and then reving it to a little higher rpm long enough for them to get the hint that I don't want to hear their s--ty music. My truck does not blow out black smoke though, just a lot of hot air.