That sounds more like a person with a divergent point of view. You know that voice we treasure so much in a democracy, the voice of dissent.
I would hope, that a "Troll" is not someone whom holds a view contrary to the popular "Group-Think". A "Troll" to me is someone whose views are entirely vulgar, consistently violent, extremely dismissive, adding absolutely zero value to meaningful discourse.
There are many people with divergent views whom few would call a troll.
And many trolls are not vulgar or violent.
Many, I think, are dismissive, however.
And one can be a troll while, occasionally, adding something of value to a discourse.
No, as I see it, a troll is someone who
wants to be disruptive -- wants to provoke, wants to leave people feeling upset.
Here's some stuff from
Wikipedia:
An Internet troll, or simply troll in Internet slang, is someone who intentionally posts controversial or contrary messages in an online community such as an online discussion forum or USENET, with the intention of baiting users into an argumentative response.
Wikipedia's remarks about intent:
Attributing intent to trolls is a very difficult issue since by its very nature to call someone a troll is to already assume an intent, that they are posting only to cause problems. So once a person is called a troll they have already been categorized by the speaker as someone with a certain intention....
Trolls can be existing members of a community that rarely post and often contribute no useful information to the thread, but instead make argumentative posts in an attempt to discredit another person, concentrating almost exclusively on facts irrelevant to the point of the conversation, with the intent of provoking a reaction from others....
The general element, that determines whether a malicious user is a troll or not, is the level of indignant emotions present in the person, coupled with the person's history with the forum or group. An indignant user who has had a previous normal relationship with the group is not a troll, even if the user uses methods of attack that are characteristic of a troll attack.
A troll's main goal is usually to arouse anger and frustration among the message board's other participants, and will write whatever it takes to achieve this end. One popular trolling strategy is the practice of Winning by Losing. While the victim is trying to put forward solid and convincing facts to prove his position, the troll's only goal is to infuriate its prey. The troll takes (what it knows to be) a badly flawed, wholly illogical argument, and then vigorously defends it while mocking and insulting its prey. The troll looks like a complete fool, but this is all part of the plan. The victim becomes noticeably angry by trying to repeatedly explain the flaws of the troll's argument. Provoking this anger was the troll's one and only goal from the very beginning.