If you check most of the threads, they're mostly called pigs because of what is hatched in their brain and comes out of their mouths.
If Ann Coulter did an Arianna Huffington, she would be a fat pig and be dead to me. Until then, she's cute and could use a burger.
Dittos for Catherine Zeta-Jones (she may be a big lefty but I haven't heard anything), Patricia Heaton, et al.
The threads I'm referring to are simply those commenting on pictures of women. Girls in a fashion show called 'pigs' because they were heavier than the girl standing next to them. Women in a beauty contest called pudgy because they were normal weights etc.
Most, if not all of the fat pig comments I remembered were directed at pictures, often no one even knew the name of the female being slammed.