The kind that know they can get away with it. They won't be charged with any crime and they won't have to repay any money they stole from the victim.
In fact, if the sucker she claims is the father proves he isn't the father, she can always claim it's someone else .. unlimitlessly. No "three strikes you're out" rule here. She can blame anyone she comes in contact with endlessly.
Further, even for the guys who are the father and want to take care of his children and have a loving relationship with them .. they had better kiss the ass of his kids mother anytime she wants it kissed, else, he may face the wrath of a woman scorned who has the entire US government to back her up.
I'd sure be interested in seeing the demographics of these women.
I have always taken care of my own child and have never asked for anything above and beyond what is fair and equitable towards their upbringing. I have the same job these past 25-1/2 years and in fact worked 2 jobs for the past 5-1/2 so I could provide a good home, for my part, for my daughter.
I just can't fathom the woman who is happy and content with forcing a man to rent a room with a hotplate and raping him for everything he's got in the name of "taking care of their children."