I hate tailgaters, they are second in line only to those who change lanes w/o signalling on my list of people who need die slow painful deaths for traffic offenses. Since I’m not yet empowred by any recognized legal authority to torture tailgaters to death I’ve had to find other means to punish them. I’ve found that the most effective way to work them into a frothing rage is to make 'em go even slower than they already are. I usually start with a quick brake-check just so they start paying attention again once they see the lights flash. If that doesn’t work I’ll hit 'em again a couple times hard enough to slow the car down. This scares off most casual tailgaters but the real professionals stick in there, close enough that I can’t see their liscense plate. At this point I just take my foot off the gas until I’m going the posted minimum speed. This really pisses them off because not only are they going really slow now but are often going too slow to easily merge into the fast lane to get around me. When I’m really lucky drivers in other lanes will play along and we’ll form a wall of bumpers (at or near the speed limit usually) and watch with glee as the tailgater drifts from lane to lane unable to pass any of us.
A couple of years ago I was on a pretty long road trip, and on one of the legs I was driving on I-10, east through Alabama on my way to New Orleans. Now as it happens I-10 passes through a tunnel under the river in Mobile. Tunnels being tunnels the speed limit is IIRC 40mph. Since the rental car wasn’t under my name I really didn’t want to get pulled for speeding so I was obeying the limit everywhere I went, including this tunnel. The semi driver behind me had different ideas about what constituted a safe speed in the tunnel and sought to encourage me to speed up by tailgating me close enough that I couldn’t see anything else in any of my mirrors. I did the standard brake check routine as above and this simply pissed him off more. Ever hear a semi’s air horn from two feet away in a tunnel? It’s really fucking loud, I mean like scary loud. So fearing a fatal collision I let the car slow down until I felt safe. He never picked up on the fact if he backed off a little we’d at least do the speed limit. As a result we emerged from that tunnel crawling at 25mph. Once we emerged I punched it up to 65, the speed limit and continued on my merry way. When he caught up and overtook me he was doing at least 80 or 90. Sadly I was not treated with the site of a jackknifed tractor trailer on the side of the road later on