MOOC on Copyright

I have started an interesting MOOC about copyright. The history of copyright is really interesting.  I found this interesting link on Common Copyright Errors. Copyright is automatic so there is no need to complete formalities such as register the copyrighted work unless the work has some financial or emotional value.  Protection covers works that are perceptible to the senses.  There are five questions to guide decisions on copyright protection. First, is the work protected under copyright or is it in the public domain?

This particular article about  5 C ommon Copyright Mistakes on Your Blog makes me nervous especially the section on Fair Use.