“This car in front of me is too slow, let me get right on the bumper, that’ll get the driver to speed up! Grrrrrrr.”

If they were thinking clearly and rationally they wouldn't be tailgating.  If I have to stop short for some reason or other, they wind up in my trunk.  

There are two types of tailgaters.

I have been in the passenger seat of cars driven by the first type of tailgaters. They seem to be quite oblivious to the idea that there is such a thing as a safe distance between cars. They simply drive right until a car is blocking their way and stay there, matching the speed of the car in front of them, as if this is the way we all are supposed to drive. They generally are not upset about what speed the car in front is traveling at. 

The second type of tailgater will pull around you at the first opportunity and give a one-fingered salute. They are thinking that you are going way too slow, no matter how fast you are going or what the road conditions are. They just want to get close enough to see ahead of you and seize the opportunity to get one car length closer to their destination.

I never have a problem with tailgaters, they  just go around, no drama. 

They're thinking, "I'm in a hurry; get the ---- out of my way!"  (and that's ALL they're thinking)