But if they are only staying a few months, it’s not like a new lease is going to change any bad behaviors.

I personally witnessed some of the neighbor's bad behavior prior to leasing the property but I attributed the behavior to the idea that the house was empty before I bought it and that he would respect the fact that someone was now living next door. 

Leases contain clauses related to tenant behavior.

So the people that  genuinely need to get a tenant out have to wait ages and lose lots of money because of the volume of frivolous eviction suits brought by landlords who are really trying to get paid.Does that attitude work for the betterment of all, or are landlords by aggregate of their behavior actually shooting themselves in the foot.Here is an analogy for you. 

Keep in mind that - you stay where you focus - meaning if you're going to choose to direct you're attention and energy to what you think you're going to mess up that's where your focus and your behavior are going to stay.

It may guide tenant behaviors, but the ultimate responsibility is yours.

Being said, owners are still responsible for the behavior of their animals.

It rewards bad behavior.

But we can still exclude behaviors we don't want occurring in our property. 

Derogatory implies a more abhorrent behavior in my opinion.