How do you dispose of empty cigarette lighters?

United States
June 30, 2008 3:20pm CST
A friend of mine told me that he throws his cigarette lighters in the trash to dispose of them. And since I don't smoke, I don't have any knowledge of how others do this. Is it safe to throw a lighter in the trash? Won't that catch something on fire, assuming the container is pierced or comes into contact with fire? What's the safe procedure for disposing of a lighter or matches? Where do you throw them away? Would that be considered hazardous waste?