Given that, when hunting, camouflage is the last thing one would be inclined to wear.

Ah, but Stim, you're positing the existence of a large number of sentient beings that simply don't exist.

In order to save these idiots from themselves, there ARE a number of U.S. states that mandate blaze orange clothing for hunting ( since the critters being hunted are color-blind anyway )- but I think that by doing so they're only short-circuiting natural selection, to the detriment of the species overall.