Vivaldiren wrote...
throwing away the average human beings feelings and inhibitions there isn't really a reason to prevent such a thing. The only things that prevent us from doing so are social norms and a lack of need. The simple answer is the Joker was right,
"You see, their morals, their code, it's a bad joke. Dropped at the first sign of trouble. They're only as good as the world allows them to be. I'll show you. When the chips are down, these... these civilized people, they'll eat each other."
- The Joker
Nice to know you get your philosophy from fiction movies based on comic books.
It is, of course, absolute bollocks, and, if you recall from the movie, when he tried to prove that...it failed in a stupendously epic fashion.
The simple answer is, if the Joker was right, we wouldn't have rules in the first place. We wouldn't impose morals on ourselves, we wouldn't try to strengthen the morals we have now. The Joker was wrong. Plain and simple.