Wish I knew about the emphasis about hacking a system question and I would have elaborated on my application.... Although it is a difficult question to put emphasis on IMO because it also makes you in a way "reveal" your bad morals... which I am sure many people don't feel comfortable doing. Why would you ever want to openly admit you beat ie. cheated a system be it government, academic, or private? Not to imply that…
Any system that loves its rules is ripe for this sort of thing. My wife's mother was born in Canada but came over as a child and had to renounce her citizenship at one point. They changed their rules so we were able to get her citizenship re-instated and my wife can be a Canadian citizen too. She's never even been to Canada.
I always get a little thrill out of beating rules people with their rules. These things aren't harmful (generally) to members of the system, though these kinds of loopholes only tend to exist as long as they aren't too greatly used.
Now being a welfare cheat or talking about how much you like shoplifting is probably not a good idea, but doesn't everyone commit a little harmless loophole exploitation from time to time?
EDIT: The general weakness of institutions are rules. Anyone wanted to disrupt such things needs to know how to exploit those weaknesses.