David W.E. Roberts wrote:
I use a special email address ' for Usenet postings
because bad people harvest email addresses from newsgroup postings and then
sell them to spammers.

In just over year, I bet I've had about 300 "spam" e-mails, most of
which (IMO) have come from non-Usenet sources. There are only about
a hundred people on usenet, anyway, so it's not a prime resource
for e-mail address "harvesting".