It happens a couple of times every year. Out on a back road with a group of up to 10 road riders, single file getting a good workout. We get passed by most often an older style Ram with a younger male driver, "Rollin coal" as he traverses our group. Nothing we can do but continue riding when as a cyclist, you take life as it unfolds when sharing the road with motor vehicles.
I figure this type of person has a bit of an attitude and probably ,"Rolls Coal" often just because they think it,s funny. I am sure that this kind of person makes up only a small percentage of chipped diesel owners.
Dave