Yes, un-Constitutional laws are null and void. Shall not be infringed. The natural right of self-defense doesn’t come from government and it doesn’t disappear in school zones, just like atrocities don’t magically not happen in school zones. But be a good little serf and follow policies. As I’m sure there’s all kinds of rules and regulations regarding blade lengths, blackjacks, mace, blah blah blah. And then we get Virginia tech with massive death toll, while the “only ones” the police ran outside from tree to tree scared not entering building. Nope, unacceptable.
Fine. Open carry into a post office and let me know how that works out for you.