If there’s a simple answer to every problem, then perhaps medically supervised tapeworms is a solution to serious obesity cases? Doctors use leeches, so why not tapeworms? It seems like it might be safer than stomach stapling, liposuction, etc.
Introducing the tapeworms should be simple, maybe even in pill form. A little caution and modern sewage treatment should take care of the worms that exit. It could be an out-patient procedure. Removal of the tapeworms is trivial. Black walnut extract, in pill form, destroys tapeworms in dogs and humans.
What are the other side effects of this, besides a little anal itching? Would it be possible to eliminate those side effects through genetic modification or selective breeding?