If someone tailgates me I consider that an act of aggression. I'll dial 911 and tell them someone is tailgating me and I feel in danger. I also ask the dispatcher if this qualifies for the "stand your ground" law. I get the annoying SOB's plate number and turn it into the police.
No need to get upset. Let the police handle it.
Then treat yourself to a Carnival cruise. Think I'll go on that new cruise called the "drifter".
Bob