If I get bit, I will kill the rattle snake (for ID purposes). Sounds stupid, but I don't kill them anymore unless they are in the yard. Same goes with Copperheads. That would be a major event now since I live in a subdivision. The only poisonous snake I kill on sight or even go out of my way to kill are Water Moccasins.
I know you can not legally poessess a live wild rattlesnake any more.