How I deal with arsehole tailgaters:
1. Check the rear-view mirror: does the tailgater look dangerous and likely to harm you?
1.a. If yes, then pull over and let them pass. You don't want to get in the way of a violent animal. It's not worth it.
1.b. If no, then break every 5 seconds and watch the hilarious reactions from the mirror.
I got this one "lady" riled up a few weeks ago and she was flailing her arms about like a crazed gorilla.
I don't even know how she kept control of her vehicle with her arms moving around like that...
Misanthrope, Loner, Adventurer.