Eurogamer - Guns Don't Kill People - Games Do.
Society has a problem, and there must be a cause. What has been influencing society increasingly recently? Well, everybody's playing videogames these days. That must be it - look, little Johnny's sitting in front of the TV instead out playing in the park. Problem identified and neatly gift-wrapped.

You can substitute this Rickets problem for any number of society's modern day ills, including obesity and violence, because the underlying argument is nothing new.