Dan: IMHO most of the snakes don't rattle because they ain't there. I don't buy this story that the snakes have learned not to rattle at people. Every rattlesnake I've seen in the past 4 years has either been in plain sight and snoozing, or rattled at me in the grass/weeds/rocks.
But if snake boots make you feel better, go for it!
"I'm gonna have to science the schit out of this." Mark Watney, Sol 59, Mars
