Good grief.
The disassembly and destruction of one's digestive system for the purposes of getting to a "healthy weight" seems a perverted path to me. I know 5 or 6 people personally who have had bariatric surgery, and not a single one could be remotely considered a success. I have personally been under 220 lbs for about one month in the last 20 years, which was immediately following my open-heart surgery, and at which time I couldn't hold down a meal. I had a few people complimented me on how good I looked, and I told them that all it took was throwing up every single morsel of food I ate.
I believe we need to quit vilifying fat as an evil and as an indicator of ill health. Instead, as JMJW alludes to, we ought to encourage people to be active and to consume foods that are good for them. In doing so, I expect we'd have quite a different landscape.
Erin