We have about the most restrictive laws on insect importation in the world. Basically, our USDA are beureaucrats w/ power...so they use it. Mostly the regs are useless, don't stop anything, and are just another way for the feds to control you. Regs should be on a statewide basis...not federal. Alaska doesn't need the same restrictions as Florida. But, they will send out the armed agents and seize your stuff if you get caught with "foreign moths".
Most enthusiasts, ignore them.