It was reported to Google where the spam originated.
Google may or may not decide to do anything about it. Since
Google is not an ISP there isn't much they can do except
drop the member but he/she can sign up with many others who
supply acess to news groups. Some of these suppliers are not
particularly ethical.
 Nasty e-mail to an originator is _never_ in order. It
would not discourage anyone and, for that matter, the real
e-mail address of the spammer is hardly ever available. The
best action is to complain to the originating ISP where it
can be determined. Of course, many spammers forge or spoof
the entire header or use open relays, which still exist.
There is really not much that can be done about them
although complaining to every ISP in the route trace can
sometimes help.
 Any commercial enterprize advertising here is cheating on
the face of it. They are looking for free advertising, that
is not the purpose of Usenet. We all pay for this service,
unless you get your internet access free. I do not, so I
have some right to insist that users follow the rather
limited rules of the road including posting in accordance
with the charters.
 The rec.photo groups have stayed relatively free of spam
mostly because of social pressure here and the number of
participants who DO complain to ISP's. Anyone can find out
how to complain about spam by doing a simple web search. I
encourage others on this list to educate themselves. Volume
of complaints _does_ make a difference.