Cheating, forgery, fraud, threat, defamation, etc can also be done through using computer. These crimes are tackled under IPC sections and other special laws. For example, for sending a threat email, the person can be booked under Section 506 IPC; for defamatory email, there is Section 500 IPC; for online sale of illegal drugs, NDPS Act comes to play, and so on. Legal Advice On Cyber Crimes