Desire is one thing that many people do not fully get an understanding of. I learnt that the satisfaction that comes from these desires are short-lived. After that short moment, you're already yearning for something else. This alone proves that human need are really insatiable.
On the other hand, those who do illegal things like scam people, just to fulfill their desires are doing themselves more harm than good. Because once they begin, the urge to continue will always linger.