I've trained brownie scouts with inert spray units, yet one of the most ridiculous laws on the books, CA Penal Code 12403.7, makes it unlawful for minors (under 18) to possess non-lethal pepper spray. Your government, hard at work! (Right up until the last minute, when they call off search and recovery efforts.)
12403.7. Notwithstanding any other law, any person may purchase, possess, or use tear gas and tear gas weapons for the projection or release of tear gas if the tear gas and tear gas weapons are used solely for self-defense purposes, subject to the following requirements: (a) No person convicted of a felony or any crime involving an assault under the laws of the United States, the State of California, or any other state, government, or country or convicted of misuse of tear gas under subdivision (g) shall purchase, possess, or use tear gas or tear gas weapons. (b) No person who is addicted to any narcotic drug shall purchase, possess, or use tear gas or tear gas weapons. (c) No person shall sell or furnish any tear gas or tear gas weapon to a minor. (d) No person who is a minor shall purchase, possess, or use tear gas or tear gas weapons.