In the US, the law itself consists of about half a page spelling out the exclusive rights of the creator of a work, and 86 pages of limitations, defenses, and exceptions to those rights--that's a lot of wiggle room!
The strictness comes more in how the law is interpreted and applied, which has never been consistent. There are many countries you might think of as lenient--even encouraging--to infringers, that have nearly exactly the same laws as the US, just not as intently enforced.
Copyright laws are confusing to people who have not had the precise training to understand the legal process.
A copyright lawyer it a layer who specializes in copyright laws and intellectual property laws. They handle cases concerning copyright infrsingement.
Plagarism or copyright Laws!
Drugs and other pharmaceuticals are protected under the patent laws not under the copyright laws.
Copying, altering, distributing, or performing/displaying a work for which you are not the copyright holder, and for which you do not have permission from the rightsholder or an exemption in the law, is a violation of copyright laws.
Everything written or recorded since 1923 is affected by copyright laws.
copyright laws
Copyright is a federal law which would be valid in California.
Trademark yes copyright no.
Software license and copyright laws vary by state and type. Most laws state that software can only be used by authorized people. Copyright laws also state that only authorized individuals can use the image or writing.
Not particularly strict; it's under the same copyright laws as anything else.
The U.S. Copyright Office http://www.copyright.gov/
People who have broken copyright law are called infringers.