I'm a little surprised that I'm the first one to mention this, but aren't there several peer reviewed scientific studies showing that rattlesnake round-ups are actually producing more dangerous snakes? Basically, IIRC, the louder the rattle, the more likely to be found by "hunters" and then they are basically pressuring a species into evolving into a quiet or even silent rattlesnake because they are the ones left to breed.
I'd rather be warned, and loudly, to stay away from a snake that doesn't really want to bite me as much as I don't really want to get bitten, then accidentally sneak up on one who can't warn me away.