We really are on a very slippery slope in regards to what is considered "under the influence". The window for what is not considered so is getting smaller and smaller. There is evidence that driving while tired is every bit as dangerous as drunk driving. This guy drinks some coffee to combat that, and now he's "under the influence". With this mindset, the only real solution would be chip implants that monitor our vitals at all times, which will lead to an effort to keep us all in a neutral state of mind. Scary stuff and very Orwellian indeed.