Dear Laurence82,
Yes, it is not easy to detect. But Barracuda gives himself away.
First he claims he does not work for SPH, but in
his profile, he says he is an editor. This is a kind of skimming
and playing with words. He is not wrong in saying that if he is
working for MediaCorp as news editor or editor of Today.
I was referring to "local mass media" or "news agent", I
didn't specify SPH. 
And it is true that only people in the mass media line,
intelligence services, Public Relations etc would be able to access
information providers' archives and such. They pay heavy
subsription fees for them to utilize the search engines there.
Don't you find it strange that he could pull out any ST articles so
fast?
PR companies or mass media people use a special
search engine created by organizations like wiser or Factiva that
could give them quick access to news articles and
information.
Thus, when he tries to set up the trap for me, to ask me whether HK
newspapers report on the Malaysian MAS' plane being sobatage, I
already he knew he has hidden agenda. If he could search through
news archives so fast, most probably he already knew the answer and
hope that I would fall into the trap by being "egoistic".
Only agent would want to do that. 
Agents would always pretend to be "normal" people; "concerned
citizen". As I have mentioned, they will wait quietly to bite hard
but at the same time, trying to hide their intent and agenda. But
in this instances, Barracuda has his boat overturn in a small
longkang.
Although he tried to diffuse the attack and
do some damage control by bringing in differentiation of Mr. Chiam
and Mr. Low, his cover has already been blown off.
Concerned citizens don't go around setting traps; Concerned
citizens don't go around labelling people together to give
generalized bad publicity to opposition parties. Concerned citizens
don't play with words deliberately to mislead you. 
Goh Meng Seng