Don't EVER tap the brakes at a tailgater. Most likely, they're already anxious and angry, and most likely if they're tailgating, they already have a bad driving record and don't care if they crash into you and get yet another accident on record. Just pull over into the next lane and let them by, or motion them to pass asap and LET THEM when they go for it. I don't know if my attitude on this comes with age and experience, of if I'm just more secure with my manhood... I just don't need to be the boss on the highway.
I feel the same way, life's to short to deal with idiots or road rage asswipes. I have a life to live and a family I love.
I drive a 2006 GMC Sierra Pro Sport, black on black, corsa exhaust, Denali 20" rims.. classy looking not obnoxious.
On the highway I ALWAYS get some tough guy in another pick up(usually a ford or dodge) who floors it next to me so I can hear "his" badass POS. I don't even glance or acknowledge them as they are doing it. I just let them go on their tough guy way, bruising their ego knowing I couldn't give a fuck about their 2005 dodge diesel with uber geigh smoke stacks coming out from behind the cab.