I can relate with most of what's been listed here. My biggest peeves are:
1) Un-eduacted doctors: A few years ago when I was at 145 (15% body fat), my (now former) doctor (who weighs maybe 90 lbs soaking wet and is completely anti-LC ) told me that to be in my "healthy weight range" I needed to lose at least 30 lbs. (I'm 5' 6 and lifted weights 3 times a week)
2) Buying Clothes: At the rate I was gaining, I didn't want to spend a lot of money on clothes. At my top weight I went to a certain nation wide department store, and when I came out of the dressing room to ask my husband how the pants look, the witch sitting at the customer service desk rudely informed me "You're too big to wear those, you're going to rip the back out." I then went to a plus size woman's store and was lectured by the sales woman that they didn't have any clothes to fit me and to go somewhere else (which ties into my 3rd peeve)
3) (And my final one!!) People who also have weight problems (sometimes worse than my own), that come down on me for my weight problem.