I knew one man who lived and died a tax protester, not unlike Hovind and I know of one living, not unlike Hovind, a long time tax protester. There are many other lifetime un-prosecuted tax protesters, some deceased and some still alive.
Perhaps it would take a constitutional amendment to lawfully convict these folks, or perhaps, were they prosecuted, the government is concerned about opening some cans of worms, so to speak, which they want kept closed.
I believe the reason Hovind got busted is because of his notoriety as a creationist, whether or not his science was well founded.
Though Hovind, like other YECs, considered himself to be a Biblical literalist, in reality, he was not. He was a very intelligent and witty debater who convinced a lot of the creationist minded sheeple into believing he was a Biblical literalist, but he did not reason out what Genesis one says regarding the timing of the creation of the celestial bodies of the Solar System relative to the role of the sun and moon, etc.
BUZSAW B 4 U 2 C Y BUZ SAW.
The Immeasurable Present Eternally Extends the Infinite Past And Infinitely Consumes The Eternal Future.