I take my foot off the gas pedal. Eventually, the tailgater passes ya. Then I put my brights on and tailgate him for a bit. See how he likes it.
@)
tailgating is probably the biggest cause of accidents. Although I drive very fast, I never tailgate.
if somebody is tailgating me, I'll try to let them pass if I can. If I can't, like when there are cars in front of me I can't pass, I'll give him a brake tap and / or maybe give him a you're an idiot hand sign.