Why do people spread viruses? Explain.

One cannot understand the logic behind people's addiction to create and spread viruses. There are some reasons that might explain why people spread viruses:

1. They don't think about the consequences, others have to face.
2. They draw a false distinction between creating/publishing viruses and distributing them.
3. They consider it to be the responsibility of someone else to protect systems from their creations.
4. This is a way they fight with the authorities.
5. They think it is a way of getting attention/recognition from their peers.
6. They want to engage the antivirus vendors in a job.