Either wave them to pass you or simply get out of their way. It's very suicidal. What's best is t turn away if someone calls you out for a challenge. There are three methods that drivers can use that conveys a message to it's receiver. Vehicular communication is using resources of your car.
Verbal communication is used majority for protesting or cursing.
And lastly, gestures and facial expressions. That's one method that lets other drivers really understand what you'll do. These methods are truly effective for everyone and is used universally. It also gave methods I surely can use to improve my driving. I'm glad I got a chance to view this report because I've got some pointers on how to do my own reports.