Unethical actions in the online world

Software Piracy
 - The copying or use of a software without proper permission or license from the software's company. This is illegal as it reduces the software company's profit.

Spamming
- The flooding of useless messages to a user. It can either be spam mail (repetitive advertisements) or messages from an unwanted user seeking to annoy other users.

Hacking
- Illegally accessing someone else's personal information online and using it for their own wishes. Purposes may vary from the invasion of someone's privacy to using their information for personal gain.