Don't you get it? 'Freedom units' as in freedom from the global conspiracy of the metric system ... or the only country to use an outdated and complicated measuring system
The thing of it is, the metric system is just as absurd as the English system. People love the nice order of magnitude multipliers, but they are need not be unique to the metric system. I worked in engineering for many years and we commonly used terms like KIPS, short for Kilo Pounds.
Before you go calling the metric system neat and orderly, take a look at how the base units are defined. Since 1798 the meter for example has been redefined 5 times and is still nothing you can easily relate to with your body. The inch also has a colorful past, and sadly since 1959 has been defined by it's fraction of a meter. How insulting to the poor inch! All that being said, I can measure an inch pretty damn close with the first joint of my index finger. My size 10 boot is near exactly a foot, and a comfortable stride is just about a perfect yard. I have to say that I can relate much more comfortably to english units in lots of everyday activities.
The gram is at least as strange. It used to be the si unit of mass, but that was changed to the kilogram. The kilogram standard , the IPK, is weight of a hunk of metal hidden away in a bunker, or one of it's sisters. There are proposals out for a standard that can be reproduced without the original but they have not materialized yet. Most of the kids I know understand grams, but only because the price of ounces is out of their reach.
There are places where the metric system makes sense and is much easier, but that is not universal. I think both systems have their place. You just have to be more careful than NASA if you use both.