These cases mark a change in the application of firearms law for the better. By making this into a gun safety issue — which even the most ardent supporter of the Second Amendment should be able to get behind — prosecutors can hold gun owners responsible for failing to keep their firearms safe, secure, and away from those who may use them for wrongdoings.
These parents never should've been charged — never mind convicted and sentenced. The Crumbleys didn't break any law that exists on the books, as they didn't do, plan, or participate in their son's crime. This is opening a Pandora's Box for future criminal prosecution of people who haven't broken the law but may be loosely connected to someone who does.
There is a 0.1% chance that the Second Amendment, as written and in force on December 13th, 2018, will be successfully amended or repealed before Jan. 1, 2025, according to the Metaculus prediction community.