Via the BBC:

“When you are actively in your eating disorder, you desperately want someone to understand, and a lot of time you find groups like the pro groups on Facebook that are supportive of you continuing your eating disorder,” she says.

The article mentions that some people go on to seek treatment, making me wonder if this phenomenon isn’t some type of elaborate bait-and-switch, but my first reaction to the idea of a ‘pro-ana’ group was to file them under NAMBLA-ish whackjobs. But unlike NAMBLA, these people seem to be more naive than predatory. Case in point, from the article:

“Hearing girls your weight or smaller say they are fat makes you feel worthless. Ana tips can push you to take it too far and thinspirational pictures give you an unattainable goal.”

Really? Wouldn’t have thought…