How many rapes, for instance, are even an attempt to do the right thing? Not a whole lot! And if they're not trying to be good, how likely is it to come out good by accident, given what we already know about what they did? Very unlikely!
Ah, looks like I was confused by "good" in "good ideas". I read it as "effective", good ideas are those which are instrumentally good and will allow you to get to your goal, whichever it may be, quickly and cheaply. But do you mean "good" as the opposite of wrong/evil?
Munchkin ideas are not about attempting to do the right thing. Munchkin ideas are about hacking the rules to gain an advantage, basically.
Thus spake Eliezer:
It seems that many here might have outlandish ideas for ways of improving our lives. For instance, a recent post advocated installing really bright lights as a way to boost alertness and productivity. We should not adopt such hacks into our dogma until we're pretty sure they work; however, one way of knowing whether a crazy idea works is to try implementing it, and you may have more ideas than you're planning to implement.
So: please post all such lifehack ideas! Even if you haven't tried them, even if they seem unlikely to work. Post them separately, unless some other way would be more appropriate. If you've tried some idea and it hasn't worked, it would be useful to post that too.