Criminals, particularly cyber criminals, aren’t “good” people; in most cases, they do have their own personal boundaries. Every once in a while, you encounter a criminal who’s different. Someone who seems not to have limits at all. A ruthless person, for whom the goal truly justifies the means. Leo Kuvayev is that kind of a person – and that made him so successful as a cyber-criminal. But even a genius criminal can go just one step too far.