It was probably the lack of clarity--
Now here's an absolutely true story: shortly after Al told me that GB Sr. had purchased a "Tsunami," I was going across the Canadian/U.S. border with several hundred of them on my way to sell at a convention. The U.S. Custom guys looked at them and asked me in for an interview -- right under a picture of then president GB Sr.
I explained that it was a magic trick AND that the Prez had just purchased one. I gave them Al's phone number and said you can call him and ask him if you don't believe me. My argument was that if the Prez bought one -- it must be okay and not some sort of prohibited importation.
The guys just laughed, told me it was the best tale they'd heard all week and sent me on my way. That was back when U.S. Customs officers had a sense of humor. They've since lost it.