Does the media encourage body modification?

This is like a part two from my last blog. Do you think the people on t.v, magazines, pictures and music have an impact on the way people feel about themselves? I believe so. I strongly feel that the media has created an "acceptable" body image for both men and woman. If your a man you should be muscular, six pack, and tall. For a female I believe it has had a greater impact. Females are constantly being compared to thin and tall models. Or actresses or musicians who have "the perfect body." In the past when our grandparents were our ages,did they understand what botox injections were? Or that you can lift, cut, and add things on your face or anywhere on your body? In this day and age, people would look at you funny if you didnt know what these things were.
Why are models so skinny in the first place? Dont they model clothes the public will hopefully buy? Generally the public is not a size zero. How is this appealing to people who are not size zero? I never understood it. I always felt models should symbolize a womans natural looking body. Yes like me, there are some naturally very thin girls out there, however that is only a select percent. When they began modeling for plus size woman, I felt this was a great step up in the modeling world. I seriously think they need to put a minimum weight on models, especially because many suffer from eating disorders and emotional problems because of the competition to be the thinniest. As you can see it is not a pleasant site.