My definition of trolling is a bit different than other people's.
The way I see it, there are 3 types of trolls: the angry troll, the stupid troll, and the agreeable troll;
-The angry troll is what most people define as a troll. this is a person who will say something incredibly stupid, ignorant, and/or fallacy filled in order to get a reaction, usually an upset reaction.
-The stupid troll is a person who acts incredibly ignorant, and usually faining curiosity, in order to get a reaction from people. this reaction is usually people's attempts to answer his question or to correct him. The stupid troll isn't as easy to discover sometimes, as many people are genuinely ignorant about certain topics. (not necessarily a bad thing, as everyone is ignorant about some topics.)
-And the last is the agreeable troll. this troll is the one people rarely consider a troll, including the troll himself. An agreeable troll is a person who will bring up a topic for discussion, one which virtually everyone has a very similar and strong opinion on. These thread discussions rarely amount to anything more than people all ranting about the topic, with all very similar views. these topics might often already have been discussed in many previous threads. The difference between the agreeable troll and the angry troll is that the angry troll's goal is to get a reaction by opposing people, whereas the agreeable troll's goal is to get a reaction by saying something they know basically everyone will agree with; they're basically the same, except for whether they seek a response thru anger or thru agreement