Use of protected material without permission or an exemption in the law is called infringement.
That actually depends upon what it is that you are using. If you use someone's car without permission, that is called stealing. If you use someone's movie without permission, that is called piracy. If you use someone's body without permission, that is called rape.
A person who enters by force without permission is commonly called a trespasser or an intruder.
The illegal copying of books and CDs is called piracy. This involves making unauthorized duplicates of copyrighted material and distributing them without permission. Piracy is a violation of intellectual property rights and is punishable by law.
giarism. It involves using someone else's work, ideas, or words without proper citation or acknowledgment. Plagiarism is considered unethical and is unacceptable in academic and professional settings.
The "fair use" exception generally allows for a portionof a copyrighted work to be used without permission for purposes such as criticism, comment, news reporting, teaching (including multiple copies for classroom use), scholarship, or research (and more recently parody/satire)
LimeWire is completely legal. However, the purpose many people use it for is not. Downloading copyrighted music, videos, or programs without the permission of the author is illegal. This is called "copyright infringement" or "piracy."
Counterfeiting
you are doing something bad
Not without a license; there is no minimum quantity to be called infringement.
stalking
Certainly, it is called theft.