Snakes, the venomous ones in particular, receive such a bad rep.  It is true that certain species can cause terrible harm to humans, but biting is almost always a snake’s last resort.  Their venom is reserved for controlling the rodents which spread such terrible diseases as bubonic plague, lyme’s, and hantavirus.  On multiple occasions, I have nearly stepped on hidden rattlesnakes while exploring the Sonoran Desert and rarely receive much more than a placid rattle.  The rattlesnakes which are pictured in defensive poses were exceptions, and mostly as a result of being helped across a trail or my excessive lingering / watching.