Caffeine addiction is much more easily overcome than Alcohol or Nicoteine (spelling), it only takes 48-72 hours to get over a caffeine related addiction, Alcohol and Nicoteine can take MONTHS TO YEARS to get over and are devastating to peoples lives.
Caffeine addiction doesnt make you spend all of your money, doesnt make you miss work, doesnt make you depressed or suicidal, its WICKED HARD to overdose on and actually have effects that would endanger your life. (over 8 ghrams of caffeine to OD to a life threatening level, thats 70 cups of coffee that would have to be consumed at one sitting and not expelled by the body, in other words, 40 vivarin is the only way to get a lethal dose, even then its readily treatable if you get to a hospital within a couple hours) It doesnt shorten your life in the long term by any measurable extent. And it really isn't hard to put down, i drink a case of pop every 2 days, i love soda, i eat chocolate covered coffee beans (insane amounts of caffeine). and if i run out i dont freak out and steal money from people to get more. I dont think about mugging people on the street for $4, i dont go steal a can of folgers from the store up the street.
If you can prove that you have actually suffered as a result of caffeine addiction to the point that you need compensation, you should be a lawyer because you can argue anything.