right...I agree with the section you point out. as with any 'label', the term troll is mis-used, or rather, ill-used sometimes. on the other hand, every woman that has ever called a guy an ass (whether using those words or similar in spirit) is always 100% accuarate.
edit- to add to that, people are not perfect, even the people who are accusing people of being a [any term]. I've made mistakes based on incorrect hasty pre-judgements... I've also seen people/myself change after realizing their/my mistake. Those mistakes do not negate the fact that trollish behavior exists...
relating levels of troll: the levels are by difficulty in detecting them. 1=easiest to detect.
have you ever received a crank phone call that at first sounds legit, but ends up being a juvinile prank? usually with a rasberry, air-horn or other nonsense.
solicitation: junkmail. pushing an agenda.
Instigators: "X style is better than Y style and I can prove it."
Ever have a conversation with someone who constantly plays devils advocate and/or always doubting even the the most solid of facts?
Since they already know everything, they only ask questions to confirm their belief that nobody else knows except them. or they only ask a question in order to dictate the 'correct' answer to others, in that regard the questions are facitious. The thread is usually guided into areas where no one can possibly have 'correct' answers... except for the ego-tripper of course. every once in a while they throw the dog a bone with "Exactly!", "Thats what I'm talking about!" or "I agree with you 100%!" ...plus that throws off their scent to troll-hunters.
The sad part is, someone can be a troll level 5 and not even know it....what do you do with these people? not sure. my suspicion is that they self-destruct by revealing their true nature after they get bored and end up getting banned.
I could be thinking about it wrong...in which case I refer to oldmans cartoon for the answers.