Don't matter unless I say they are public domain they are copyrighted.
the writer has to say I'm putting this work in public domain (word for
word) for it to be in public domain, if he does not then it not in
public domain. I suggest you some copyright law, I've been doing that
crap a lot longer the amateur radio I have a number of works that
copyrighted. under copright law you can use fair use of the work, but
as court have stated a person making a comment can only use a small
portion of the work. like I said Stebie read some Copyright Law.

Todd N9OGL