For example if you wear lycra, you will probably find that a percentage of people will regularly try to "punish" you because they think you "look funny".
The mildest form of punishment will be them driving as close to you as they dare. That could be 50mph 12"s away. That's like standing on the other side of the do not cross line in the subway as a train comes past.
That's my anecdotal experience but a quick search Youtube will turn up many examples of this. Action camera manufacturers specifically design products to document this.
Worse though, you'll probably eventually have someone be more directly aggressive to you. Maybe throwing something at you or trying to drive you off the road.
In that context I think that the phrase traffic violence is fitting. If someone is using a vehicle as a weapon what else would you call it?