Yep, the New York Times notes that, among other odd state laws, that Wyoming has enacted a law that “makes it a crime to take photographs of or make written observations about a piece of land that belongs to someone else.” While the Times includes it in a collection of kind of humorous laws, Slate has a piece that outlines just how pernicious this bill really is (the assertion in that piece is that this is to discourage collection of any data that would be used to invoke the Clean Water Act).
You can read the law yourself. Basically it outlaws, among other things, geologic mapping in the state as you cannot
…take a sample of material, acquire, gather, photograph or otherwise preserve information in any form from open land which is submitted or intended to be submitted to any agency of the state or federal government.
So watch out, all you summer field camp mappers. Better be sure your maps are not submitted anywhere. And woe unto any mapping theses being done in Wyoming, especially if your funding is from edumap or the state….