I haven't been bitten, but it wasn't for the lack of trying of several prairie rattlers. Deer hunting one year, I was climbing hand over hand up some rocks when Mr. Buzzworm took a swipe at my hand, and somehow he missed. Once when bowfishing, I was knee deep in water when a rattler comes swimming along, headed right towards me. I pushed him away three or four times with my bow, and when he kept coming he got a fish arrow in the head. Hiking along the Sweetwater River one day, I surprised a rattler who not only lit up and scared the crap out of me, but he aggressively came at me, and got a 230 grain hardball for his trouble. Now maybe rattlesnakes aren't supposed to be aggressive, but these forgot to read the manual. I don't kill non poisonous snakes, but rattlers are meat if I see one.
My brother did get bit by a prairie rattler, but the snake hit his boot and didn't get flesh. They are nasty little suckers and need killing, as far as I'm concerned.