At least this only involved passing, though. Some people try more elaborate lessons that could very well lead to an accident, taking them beyond the realm of being a stupid snob and into real jackassery. One example: Some drivers wait until the last minute to merge, bypassing a long and slow line. This annoys me as much as the next person, but some people feel the urge to show that driver how much he has inconvenienced people by tailgating him after, or even during, the merge, and continuing to ride his tail a good long time after, to make sure he notices.
Others like to "teach" a tailgater how dangerous tailgating can be, by suddenly hitting the brakes. If they learn the lesson too well, they could both end up discussing it further on the side of the road while waiting for the tow truck.
Again, a lot of these people like to separate what they're doing from road rage by pretending they're teaching people something, but first of all, they're clearly pissed and lying to themselves, and secondly, both ways indicate a person who is way too high on himself, whether you think you deserve personal revenge, or whether you think you're such an authority that you should judge and teach other people like you are Freeway Jesus.
Either way, you are angling to get shot. If you meet any of these annoying drivers on the road, don't be a goddamned road vigilante, just come here and complain about them on the Internet.
For more from Christina, check out 6 Ways Cities Are Getting Into the Attention-Whore Game and 6 Groups Who Don't Work as Movie Bad Guys Anymore.