I am going to give them the benefit of the doubt and assume that they are just really ignorant- but I think this again just highlights the need for a) more education and information to the general public about eating disorders and b) the need for continued advocacy and awareness being raised which may eventually help to change things like this that we see and encounter from day to day. It doesn't mean grand gestures. Maybe it means reading up on eating disorders (follow this link for great info on the NEDA site), encouraging your friends (and yourself!) to avoid fat talk, or maybe you point out myths about eating disorders when you have the opportunity! No matter what you do, there is nothing too small to help raise awareness. Every little bit counts.
I'm not sure if these ads are still up; I have not been able to find anything more on whether the Snack Factory pulled them or not. Hopefully they did. Please feel free to contact them and tell you how you feel about their ads if you are so inclined. Here is the link to their website and contact info!