Isn't part of the copyright law that companies must defend their right in the short-term, else it's effectively forfeiting the protection in the future? In orde

Isn't part of the copyright law that companies must defend their right in the short-term, else it's effectively forfeiting the protection in the future? In order words, you can't cherry pick. They have to be thorough and consist, else they're potentially creating a loop hole; a loop hole that might hang themselves. Note: Not defending Sony or any Big Inc, simply wonder how the law is written and how that drives corporate behavior.