I'm looking for a particular fallacy or bias that I can't find on any list.
Specifically, this is when people say "one more can't hurt;" like a person throwing an extra piece of garbage on an already littered sidewalk, a gambler who has lost nearly everything deciding to bet away the rest, a person in bad health continuing the behavior that caused the problem, etc. I can think of dozens of examples, but I can't find a name. I would expect it to be called the "Lost Cause Fallacy" or the "Fallacy of Futility" or something, but neither seems to be recognized anywhere. Does this have a standard name that I don't know, or is it so obvious that no one ever bothered to name it?
Your first example sounds related to the broken window theory, but I've never seen a name for the underlying bias. (The broken window fallacy is something else altogether.)
ITT we talk about whatever.