Of course, if people looked at the real statistics behind childhood obesity, how many children (especially girls) start obsessing about weight how early, etc. instead of getting their feel-good righteous indignation on about a particular celebrity incident, this would be a VERY different conversation.
If the child was seriously obese...needed help and the tea was prescribed by a licensed physician and administered by a licensed nurse/caretaker other than the asshat "parental unit" that enabled their child to get obese in the first place then I would be OK with this.