Aussie Troops becoming dependant on drugs in Afghanistan

Here's an interesting one: News has risen that a number of Australian Troops over in Afghanistan, Iraq have been coming home with addictions to drugs such as heroin and cocaine, which is "Cheap as chips" over there. It is believed that the Iraqis are selling the drugs cheap to the allied forces, including Aussie Diggers, to hinder their performance in battle. That's right, their hoping that mid battle the soldiers might want an Ice cream Sandwich.

Anyway, reading this made me think: Have you ever done something that you knew was stupid, something you wouldn't usually do, just because its cheap/free? I think this is a classic example of such a thing and I would love to hear your stories.