That is a load of B.S. And here I thought my state is full of backwards idiots lol.

Is something like ADT or Cox Homelife an option for you at least? While going that route might be more expensive, I fail to see how doing so would be illegal.

Otherwise, the only other options I can thing of is to either stand your ground and fight them, using force if necessary, or getting out of those apartments. Neither your neighbor nor the landlord will clearly listen to reason anyways.

I can't think of anything else without encouraging you to break the law because my solution would probably be illegal or questionable at best if I were in your position.