The crazy lady just reeks of what they call trailer trash syndrome. This isn't a dig at someone who lives in a trailer. And I'm not meaning to offend someone by saying this. I had a roommate that was a psychologist and we had numerous discussions on the topic.
Basically what it is. The person is so unhappy about there quality of life or how there life turns out, that they are just miserable. Now instead of doing something to better there situation, (like a better job, or living situation) they instead try to make everyone else around them miserable. Whether it's through harassment, rumors and lies, or other means. Such as frivolous lawsuits, property damage and such. They usually think they have been wronged by the person that they are slandering. And just live for the drama and crap. It's all about them and there perceived misfortunes even though they were the ones who put themselves into the situation in the first place.