NOW you're catchin' on!  Doesn't Hawaii prohibit importation and possession of "pet" snakes?  Cats (and dogs) do FAR more damage to native Hawiian biota (what little is left) than do snakes.  Hunt stray & feral cats to extinction.  Institutionalize the crazy cat-feeders and turn their "feed" stations into bait stations.  Put out kibble and split sardines.  Shoot every cat that comes to feed.  Use noise-suppressed ordinance so you don't startle the others until you can shoot them as well.  Rinse and repeat until no more arrive.  Make the "vacuum effect" work for the public good.  Outlaw importation, breeding and possession of cats.  Impose onerous fines on owners of free-roaming cats, with confiscation and destruction of repeat offenders' animals.  If the self-entitled ha'oles don't like it, let 'em relocate to someplace where they can coo and burble over their disease-ridden "community" vermin--preferably far from the two-thirds of our households that want nothing to do with cats.