Ive never been struck at by a snake that I wasn't intentionally jacking with.
I stepped directly over, as in it was between my legs rattle snake walking to the blind in the dark with no flashlight it scared the carp out of me, but I don't think he even struck, just rattled. We have seen at least 3 of these on our place.
I think they help keep the rattlers in check. For pretty deep south texas bfe, we see very few rattlers. When im working in and around thick cover and probably not looking where im stepping like i should, I wear chaps for cheap insurance!