If you could regulate something relatively inconsequential, what would it be?
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International standard paper sizes (A4 etc.) in the U.S.
Metric units aka SI units aka sanity
I assumed it was global... What do you use in the US?
A pretty-much arbitrary system based on a standard letter size of 8.5 in x 11 in, with multiples and fractions thereof. It lacks the critical √2 aspect ratio, so pages designed for one size have the wrong proportions when scaled up or down.
That sounds like a massive pain in the backside.
No, it promotes Freedom(tm).