I certainly know I have been passed over for jobs and actively discriminated against in the work place due to my weight (along with other things, I think there is never just the one thing)

10+ years ago when I was first looking for work in Melbourne, I could wow them with my resume, wow them with a phone interview, but within 5 minutes of the interview I would "Oh, you don't have a degree" well, derr, you knew that from my resume and from talking to me prior. I would then look around the office and see all the women were thin. May be it was part presentation? I don't know. Pretty sure I dressed the part.

When I finally did get myself a good job where I was hired on skill, I had a manager come in who was all about looks. He loved the other girls in the team who were not overweight. He hated me from the start, yes we did have differing personalities/backgrounds, but I worked out later a lot of it was due to my weight. During my time there I lost a lot of weight. The more weight I lost, the more his hate for me diminished. He stopped trying to get me fired and was actually upset when I resigned to move onto a better job. I also noticed during that time that other staff become friendlier as the kilos dropped.

There was a cute, eye lash flashing, big boobed girl in my team. She got away with everything, she really was not that great at her job, she put in heaps of hours (which was seen as great, not as her covering her in competencies). I caught her stealing from the company, the same manager let her off "as a mistake", stupid really she later stole almost $50k from the company. I know if I had done what I first caught her doing, I would either received a severe warning or even lost my job.

It sucks it really does, but looks are really only one factor in treatment in the work place.