Proana Websites

I went on my first "proana" website tonight. Scariest thing of my life, I cried as I read how these girls, ages 14-27, explain how they will go days with only drinking water. They also encourage me to do the same. Some of them doing this for year and years. If I continue down this path with I turn into them? Will I become obsessed with my weight until my 20s? This is not what I thought I was getting into.. This was definitely an eye-opener.