Do you or anyone you know drive below the speed limit on purpose?

These people are alien to me. I got behind one of these creatures today and they were going below 20mph in a 25 and below 30 in a 35.

My theory of these people:
I think many of these people don't have anything to do. They don't have jobs or are retired and aren't in any real hurry to get anywhere.
Or maybe they are incredibly thrifty and are trying to save gas and be hyper-safe.

I also think some have never really had jobs and have no understanding of why some people are actually in a hurry to get somewhere. As if it is a life they have never known. I think people like me are just as foreign to them as they are to me.

If you thought about this in the context of a disease, there are absolutely different stages of it.

Like an example of an early stage of the affliction would be:
1. Someone who waits 3 or more seconds (1 Mississippi, 2 Mississippi, 3 Mississippi) after a traffic light has turned green before they actually start to move. And after finally moving, they go very slow and only a handful of people make it through the redlight when twice as many cars should have! I encountered a few of these today too.

I've noticed an amazing attribute of most of these people. Most of them could care less if they are holding you up, in your way, in your lane or generally slowly you down at all. At times, they'll actually go slower just to piss you off, if they think you are driving to close to them.

Truth is I'm braking to go this slow and it's difficult to consistently keep this ridiculous rate of slow speed.

They won't speed up! They're almost offended that someone has the nerve to need to go faster than them. It's remarkable!

I'm not talking about everyone needing to drive like a lunatic. I'm talking about people driving in a way that suggests they have a relatively meaningful need to get somewhere in a reasonable amount of time vs. driving as if time doesn't exist and without any concern for another human being who might need to get somewhere and have no interest for wasting time in the process of getting there.

In a perfect world, these people could be separated from the general population and live in Slowville where nothing ever happens and everyone can exist without a schedule because nothing is on the schedule.

Besides the OT hard-asses who will respond that they can drive as slow as they damn well please...are there any other responses besides being uber-safe and uber-thrifty?