10 Big Myths about
copyright explained
By Brad Templeton
1. If it doesn't
have a copyright notice, it's not copyrighted."
This was true in the past, but today almost all major nations follow the Berne
copyright convention. For example, in the USA, almost everything created
privately after April 1, 1989 is copyrighted and protected whether it has a
notice or not.
2. If I
don't charge for it, it's not a violation." 
False. Whether you charge can affect the damages awarded in court, but that's
essentially the only difference. It's still a violation if you give it away
-- and there can still be heavy damages if you hurt the commercial value of
the property.
3. If it's
posted to Usenet it's in the public domain."
False. Nothing is in the public domain anymore unless the owner explicitly
puts it in the public domain. Explicitly, as in you have a note from the author/owner
saying, "I grant this to the public domain." Those exact words or words very
much like them.
4. My posting was just fair use!" 
The "fair use" exemption to copyright law was created to allow things such
as commentary, parody, news reporting, research and education about copyrighted
works without the permission of the author.
5. If you don't
defend your copyright you lose it."
False. Copyright is effectively never lost these days, unless explicitly given
away. You may be thinking of trade marks, which can be weakened or lost if
not defended.

6. Somebody has that name copyrighted!"
You can't "copyright a name," or anything short like that Titles usually
don't qualify -- but I doubt you may write a song entitled "Everybody's
got something to hide except for me and my monkey." (J.Lennon/P.McCartney)
You can't copyright words, but you can trademark them, generally by using them
to refer to your brand of a generic type of product or service.

7. They can't
get me, defendants in court have powerful rights"
Copyright law is mostly civil law. If you violate copyright you would usually
get sued, not charged with a crime. "Innocent until proven guilty" is a principle
of criminal law, as is "proof beyond a reasonable doubt."

8. Oh, so copyright
violation isn't a crime or anything?"
Actually, recently in the USA commercial copyright violation involving more
than 10 copies and value over $2500 was made a felony. So watch out.
9. It doesn't hurt anybody -- in fact it's
free advertising."
It's up to the owner to decide if they want the free ads or not. If they want
them, they will be sure to contact you. Don't rationalize whether it hurts
the owner or not, *ask* them.
10. They e-mailed
me a copy, so I can post it."
To have a copy is not to have the copyright. All the E-mail you write is copyrighted.
However, E-mail is not, unless previously agreed, secret. So you can certainly
*report* on what E-mail you are sent, and reveal what it says. You can even
quote parts of it to demonstrate.