I went to a reptile house in India once. It would never work in the US with all those lawyers. If I had wanted to, I could have reached down and poked a 10ft alligator in the eye.
Anyways, the poisonous snake exhibit featured a guy poking a cobra repeatedly with a stick to get it good and raving fucking mad before they milked it for venom.
The rest of the deadly snakes they just kinda let wander around. It was a wild day.