It doesn't. Those checkpoints are _federal_, run by the U.S. Department
of Agriculture, to prevent the spread of agricultural pests or diseases.
There are things here in Hawaii that aren't native to the mainland, and
if they made it there, they might have detrimental effects on crops or
ecosystems.
And yeah, it leads to funny things. My mom came to visit a few years
back, and on her way back had to give up an apple at the airport, even
though the apple had come from the mainland in the first place.
--
Dan Birchall - http://danbirchall.multiply.com/ - images, words,
technology