Do you think they should take the 200lb seven-year-old from his mother?

oh wow, this is so sad. I think, since the mother is also obese, she probably is just very uneducated on proper nutrition. That does not by any means excuse the fact that she is putting her son's health at serious risk! I think the first step would be a court order that the family MUST be counseled by a dietitian and her son needs to be put on an exercise routine under the supervision of a cardiologist. If she refuses, or if things don't improve after she has been educated on the harm she is doing to her child...then I would call it child abuse and yes, her son should be taken away from her.