“this law has never been enforced in Kennesaw.”
Maybe just raising the expectation has deterred crime.
It’s an effective psychological deterrent.
We have three German Shepherds, two of whom are out of serious working lines, one W German, the other Czech (daddy a retired working K9 from the Czech Republic), They are quite impressive. Shepherd Three is W German showlines.
I socialized the heck out of them in puppyhood. They retain a natural suspicion of strangers, but, up close and personal, they love people.
As stupid as criminals are, they will likely question the wisdom of challenging three German Shepherds.
No would-be criminal knows whether they would bite or not.
The good people of Kennesaw probably talk about guns a lot and make no effort to hide their pro gun stance.
Thus, there is some reason to believe that lazy scum bags would prefer targets less likely to bite back.