[halfcat]

>I think a good example of people who exploit bugs in people to get rich are con artists, and what they do is usually considered illegal.

Many of the richest people around got that way by exploiting some "bug", but no one considers them to have done anything illegal. They find a loophole in banking laws and become a billionaire, or you manipulate people psychologically into buying your products (modern marketing). We call these "business" so it's not illegal to exploit these "bugs".