I also feel an obligation to maintain a safe following distance behind me when someone is up my tailpipe.
I slow down so the guy behind me has room to stop for the speed in play.
That reminds me of an incident from long ago. I was 18 and had a night job which ended at 2 am, just about the same time as the drunks were emptying out of the bars. While driving home along the lonely country roads in my old rust bucket '79 Camaro, a set of headlights came up behind me pretty quickly and then the driver tailgated me very, very closely for about a minute. I assumed that since I was doing exactly the 55 mph speed limit that he would pass if I slowed down to 50 mph. I did and he didn't. After about 30 seconds I slowed again to about 40 mph but he still didn't pass and kept right on my bumper, much too close for safety. I tapped the brake pedal several times to flash my brake lights and even slowed down to 35 mph but he just hung there on my bumper.
By this time, I started to get worried and wondered if this was some maniac, maybe on drugs or something and I might be in danger of him running me off the road, either accidentally or on purpose.
So I floored the go-pedal and left him behind. With a warmed over 350 under the hood I assumed that I had seen the last of him. I was wrong. I had the car up to 120 mph for about 5 miles and then slowed back down to the speed limit as I got close to town about a mile from my house. All of a sudden the same car came zooming up behind me and he had obviously matched my speed. I was beginning to get genuinely scared.
Then the red and blue lights started flashing on top of the car behind me. I actually said, out loud,
"You've got to be ******** me!" It was a cop car that had been riding my bumper for 5 minutes with his headlights blazing in my mirrors and making me think he was a crazy person out to get me. Obviously, he assumed that a scraggly long-hair like me driving a rust bucket like mine along a country road at 2 am would be a prime target for catching a drunk driver or a bad guy with contraband or warrants or something else worth busting.
I pulled over to the shoulder, literally a block from my house, and the cop asked me if I knew why he pulled me over. I replied that it was probably because I was speeding but I added that I was driving so fast because I thought he was a maniac who was tailgating me for no reason and wouldn't pass even though I slowed down to 35 mph and gave him plenty of opportunity to go around. He ignored that and gave me the usual questions. Where was I going. Where was I coming from. Had I been drinking. Is there anything illegal in my vehicle. He even stuck his nose through my window and took a sniff, presumably checking for alcohol of weed. I hadn't done anything wrong but I was worrying that I could be about to get a reckless driving charge and be dragged off to jail.
After he ran my license and I came back clean,
he just said that I should watch my speed, wished me a good evening and then got back into his car and drove away.
Jerk.