I really hate these stories (that pop up every few months). The woman was arrested for failure to appear in court. That’s the way these stories always play out. Unfortunately, for a reporter sitting in his or her cube picking his or her nose, it also makes for a boring headline.
She should have returned the book and can't say she wasn't warned but...I assume librarians and cops make at least minimum wage. What a waste of time and money. Just ban her and her kids from checking out books until it's paid.
I'm a "I'll get around to it" too though, person. I don't check out books or rent movies because I do get busy and end up returning them late. I figure it's just cheaper to buy than pay late fees. If a cop showed up on my door step though I believe I would put the book on my priority list though.