I've seen evidence of strange behavior among people who walk their dogs on trails in parks or seminatural areas in my suburb. People will carry plastic bags for picking up their dogs' feces but then, instead of discarding the filled bag in a bin, they will throw the bag away like litter, and often in the vicinity of the bins. (I've never actually seen anyone do this, just the evidence thereof.) This behavior creates a more serious pollution issue than not cleaning up after your dog since the plastic bags don't biograde. Have there been studies on this or similar counterproductive behaviors?