I'll tell you what. Allow me to make the case for why we should consider the possibility SMG has an eating disorder, then you can defeat my arguements and demand an apology.
First of all what Buffster6 says is true:
there is a real pressure by Hollywood for actresses to be really skinny
When this kind of pressure is exerted on a driven, intelligent, individual who demands control over his or her life, and isn't getting it, often what you'll get is an anorexic. This is why anorexia is so common in the arts and entertainment field.
People with eating disorders don't want to be discovered as such. They'll go to great lengths to avoid discovery. Just as with other addictive disorders such as alcholism, they become sneaky. They lie.
Often though, their efforts at obfuscation become in themselves clues.
One thing you'll notice about anorexics is as their disorder worsens their wardrobe will change. They begin to wear longer, baggier clothes designed to hide the now boniness of their frame.
We've seen this happen onscreen to Buffy.
But the wardrobe mistress manages what the star wears, right? SMG has no control over it. Wrong... I saw an interview with SMG recently where she was explaining how she created a character from the outside in, meaning the first thing she examined was what the character looked like, what she wore.
Nevertheless times will occur in a screenplay when the wardrobe is out of the hands of even big stars like SMG.
We saw such an occurence in Get It Done when Buffy had to wear a cocktail dress. View that scene, and look to Buffy's clavicle...Bones.
Another thing to consider in an annorexic's wardrobe is as the condition worsens they begin to get cold, and must wear heavier clothes.
Recently I heard SMG complain about how cold it was in Vancouver when she was filming Scooby Doo Too. I was in Vancouver the same time she was. It wasn't that cold.
Another thing I personally notice about anorexics is a kind of sallowness or sickly look to the skin. This is subjective, so I leave it to you.
The symptoms of anorexia are not all physical. It is a disease that affects the brain, and the way the sufferer interacts in society.
Anorexics avoid the intake of food, but they are obsessed with it. You will often see them arriving at events with gifts of food. It caught my attention when SMG arrived at Angel's opening shoot with a cake. It doesn't prove anything, but it's worth taking note of.
The most obvious psychological clue as to whether or not a person is becoming anorexic is the way they avoid closeness.
Hiding their disorder becomes a priority. If someone gets too close, they might discover the secret. The sufferer of the disorder will go to extremes to push people away, often manipulating events to give them an excuse to do so.
Does everyone remember the rumours of discontent on the Buffy set in the later days. Remember the Alyson Hannigan interview where she let it slip how she was unhappy with SMG for keeping her decision to quit, secret from the cast?
Here's another one. People often get angry at me when I mention it, but it's so obvious it has to be brought out in the open for discussion. SMG has been avoiding the Buffy fans.
Anorexics can have succesful romantic relationships, but if you look into them you will usually notice a great deal of domestic control from the sufferer of the disorder. Anorexia is a disease of control. Again I leave it to you. Is Freddy whipped?
So there you have it, my opening arguements. Go ahead. Rip them apart.