With age comes grace I guess....
Tailgaters are a major frustration for me as well. Typically, depending on where I am driving, I will tap my brake lights to inform them to "back off". If that doesn't work, the I usually slow down to allow the driver behind me to pass. It isn't that important to me to get upset at that other person as they probably won't even realize that they are causing a negative reaction to their discourtious driving habit - so I don't get worked up about it.
I also don't get too troubled by what we call "Sunday drivers" around these parts. You know the type - the driver isn't really watching what speed they are traveling at (which is typically 15-20 mph under the posted speed limit) and looking at everything but the road around them. (Hey Harriet! See that deer in the field over yonder? - lol)
I am more of a defensive driver and the cargo that I carry is very precious to me. Even if I am late (which is seldom as I do plan my time well), I will take the proper time and precautions when I drive.
As far as the other driver who likes to speed and arrive at a destination quickly, the only concern that I would have is that eventually the percentages will work against you. Either you will find yourself (hopefully not) in an accident, or you will startle some old soul into driving into a ditch or another vehicle. You cannot contol all the variables and I believe that is the message others have been trying to get across to you.