I rarely get tailgaters..... but when I do.... I just go about my business and go whatever speed I'm going. If they manage to stay behind me long enough and I hit a stop light or something - I'll put the truck in reverse and act like I'm gonna backup. "Ooops, you were sooo close I couldn't see you back there. Ohh so sorry...." Other times - I'll block them in traffic on purpose, or switch lanes so they can't get around me.
I usually don't get tailgaters - as I'm the one person moving along with the faster traffic. I never get that close to vehicles......but if you cut me off or do something stupid, I'll be up your ass and stay there as long as I can
We should start a thread about on-road pet peeves!