So, I checked it out and, indeed, Craigslist is sending out an apparently genuine casting call for just such a series:
Synopsis: 20 contestants (10 male/10 female) travel by commercial aircraft to 10 different cities around the world. With the crew and pilots secure, the contestants will share the cabin area with 200 snakes. 5 of the 200 are poisonous. Each flight will be between 5 -12 hours in length. The reward at the end of each flight will be a day spent in luxury visiting the exotic destination city. Contestants can then choose to fly 3 friends out and extend their visit for week, all expense paid OR get back on the flight for the next leg of the competition. If at any time a contestant is bit by any of the 5 poisonous snake, antivenom will be administered and they will be eliminated.
This is either the dumbest idea in the history of television, or the smartest (or, it's a hoax). I can't decide which.