I think... if Hawaii hasn't gotten any snakes in the last 17 years, they should probably stop worrying about it so much. We've got trained snake-hunting dogs and traps all around the air fields, that seems to be working just fine. This sounded like it'd work at first, but... Acetaminophen is toxic to cats, too. You know, the animals that keep the snakes away just by sitting around smelling like cats. But of course they'd probably want to kill the feral cats, too... Anything to save those precious birds everyone finds so adorable.
http://images.sciencedaily.com/2008/08/080808090313-large.jpg just look how cute it is!
And as adorable as the visuals of deceased mice with little parachutes is, this is my #1 Most Depressing Dump.