There are so many addictions that people have out there. Gambling, Shopping, Over eating, etc... Drugs and Alcohol aren't the only ones that are just as destructive.
I watched a married friend of mine loose her house and everything due to gambling. I also watched a friend of mine get so deep in debt she had to file bankruptcy because she could not control her shopping binges. Another friend who ate all the time, especially when stressed and developed diabetes.
There are those who even cut themselves because they have no other way to cope with emotional pain, and have scarred themselves up all over.
Addictions come in all forms, and sometimes we focus to much on the drugs and alcohol and forget the other addictions.