Cruising the internet is a humbling experience, especially if you consider yourself even modestly “with it” technologically; there’s always something you didn’t even know existed, yet upon further research you find is as common as toilet paper.
I was reading Kate Harding’s blog, Shapely Prose, when I read her caveat to potential commentators:
“*Dear Trolls, this is what’s known as EXAGGERATING FOR HUMOROUS EFFECT”.
Trolls! Hahahahahahaha. What a great term for the various weirdos who feel compelled to jump down your throat for the slightest politically incorrect opinion. Hey, Nutbar, that’s why it’s called an opinion and not a fact!
I Googled the term “troll” and the first link was to a Wikipedia article describing the widespread use of this term for the above purpose and definition. The term “troll” as a fairytale figure, came second. Man, it made me feel internet-dumb.
ΚΑFΕΝΕΙΟ 
Steve , I have come in contact with this use of the word Trolls for some time now on photo forums . They go on a site , say Nikon , and bad mouth it, But the main point is always negative .
An other term is “fan-boys” , super pro to what ever brand they are loyal to .
Both are very annoying and bring nothing to the discussion .
So unlike our Rangefinder vs DSLR deliberations with the learned Mr. Italo .
The term isn’t as widely used on blogs and forums (especially shave forums where it would be considered an ungentlemanly behavior) like it was on NNTP news groups.
The photo forums on dpreview.com can get very uncivilized !
Kind of funny at times . A lot of misplaced passion . This comes from people more interested in specifications of the camera’s rather then the “Art of photogrphy” .