Some posters seem to be upset that their posts may be used in a
book/magazine/etc where the author is paid. I rarely post but several
years ago I did post with a good quotation (reference given). The
quotation was never used in her books (which I have, have read & have
benefitted from) but very shortly after posting, I received an e-mail
from Jean asking for permission to use the quotation. I suspect that
other reputable authors have also requested and received private
authorization for quoted materials.
I also have to question the schizophrephnia/sanity/?? of posters who
post publicly and then are paranoid about how their posts might be
used.