If so, I'd pass because that shows a consistent pattern of poor financial behavior and you can bet you'll soon be added to that list.The point is, you should look at more than just the score. 

Thus rendering leverage and other "risky" behavior less of a problem.Buy for value, not price.

I think most buyers can see through that kind of behavior.

I have stopped answering phone calls and resorted only to written communication (for my records) but have noticed a pattern of very emotional and aggressive behavior from this tenant (as well as extremely unreasonable expectations about what the timeline is to have something fixed).

Yep, pretty typical behavior for her. 

That behavior is typically what prompts the beginning to the end.

I'd check with the current landlord to see if there are behavior /rule following issues. 

Have a lawyer send a letter that if the behavior does not stop, you will be issuing a notice to quit.

Don't reward their bad behavior by paying them!

I’ve gotten pretty good at predicting behavior, so it’s easier to select good tenants.