There _was_ a guy in Las Vegas who could answer your questions.
I bet you're laboring under the delusion that your comment is clever. However, last I heard there were no statutes on the books for having guns, ammunition, or lists of people. Even if you write out plans - are they the plot of a novel you're planning to write? Sorry tootsie roll I don't believe thought crimes are on the books yet. To be guilty of a crime you actually have to commit a crime in the country. Plus there is (at least officially) the presumption of innocence, that the state actually has to prove you did something, you don't have to prove that you didn't.