I may be castigated for this, but the "10-foot rule" is a standard that's both easy to understand and enforceable on a practical level. We can live with that in the hobby. It definitely restrains outlandish farbery yet definitely addresses cost of gear.
I ascribe to it. After all, it's not all that darn easy or inexpensive to even get there. It requires discipline (if not to the campaigner level).
10-foot rule? It means no big eyeglasses or wristwatches. Reasonable health and body type. Women should make a fairly serious attempt at looking like a man, not just hair stuffed. There should be a reasonable officer-to-ranks ratio. There should not be any slat chairs in camp. Infantry should be in tent halves, but a straw-filled cotton tick to lay on is not out of the question. If you must have a cot and and be a one soldier in an A-tent leave the flaps closed. If your legacy unit had 3-banded Springfields, then a repro without all the stamps and markings is ok. If in uniform keep the top button buttoned. If your unit had square buckles you have a square buckle. No more than one or two "grizzled veterans" in a unit, please. Have the right style of headgear. Western troops restrain from contorting your slouch caps into ridiculous shapes. Maybe an occasional feather. If you must have a Bowie or "Arkansas Toothpick" be a Confederate.
Consider coloring your hair. Real units were not mostly grey-hairs. (You know there is so much push-back on this one thing! Insecure masculinity or what? Get over it. Look more right at battlefield distance or become veteran reserve or something. Many of us can't be as young as a period soldier but we can at least appear younger on the battlefield at 30 yards. Don't break the spell for the spectators and each other when such a cheap fix is so easy and available). I'm realistic enough to know this one will not go anywhere, but I thought I'd mention it.
Anyway the point is that the 10-foot rule works at a practical level. It is not to be mocked, imho. It works well for spectators, especially student groups. They will at least not get the wrong idea, as they do with someone who's not right even at 20 yards. Example if they see a "Zuave" (1863 Remington contract two-bander) being used, it's nearly identical to an 1855 Harpers Ferry 2-bander so we can live with that, yes? It's what's called a talking point, save it for the detail monkeys that want to hear it.
So etc. etc. this could go on for the rest of the thread. There's no real problems with a 10-foot rule as we know there is with either "stitch-counter" standard or conversely "cowboy camping" lack of standards.