When you use your computer for forging a signature or counterfeiting, you are committing a crime. When you steal someone's personal
hard disk that contains critical information, you are stealing with malicious intent. When you show any sexual act to provoke sex in online world, you are most likely to commit prostitution. And, you can also use computers to commit larceny. We are familiar with all these old crimes, but we ignore them because these are criminal acts that we encounter even if we don't use our pc. With or without computer, a crime is still a crime.