I have been lucky so far - only a carload of rude teens shouting as they drove through our neighborhood. I remember having trouble when I used to ride my horse - jerks like to try and startle horses. I am sure however, the day will come when I get harassed on my bike - and I will be more than happy to take down their plate no. and turn them in. The best response is to ignore the driver - responding with flipping them off, cursing, etc. can result in you getting seriously harmed. A bike is no match for a car. I am lucky in that we have a lot of cyclists here in Pinellas County and cars are used to seeing them constantly. I imagine it would be worse on a lonely stretch of road and that would be a scary situation. I only ride alone on well-lit and well-known routes - and I keep my mace and cell phone within easy reach “just in case”. Sorry that happened to you and hugs.