Llama fur
Apparently, being against llama fur is a major threat to national security:
But the documents, coming after the Bush administration's confirmation that President Bush had authorized some spying without warrants in fighting terrorism, prompted charges from civil rights advocates that the government had improperly blurred the line between terrorism and acts of civil disobedience and lawful protest.
One F.B.I. document indicates that agents in Indianapolis planned to conduct surveillance as part of a "Vegan Community Project." Another document talks of the Catholic Workers group's "semi-communistic ideology." A third indicates the bureau's interest in determining the location of a protest over llama fur planned by People for the Ethical Treatment of Animals.
After all, if you hate this, you're aiding the enemy. And naked llamas are the number one weapon in the war on terror.