"In Internet slang, a troll is a person who posts inflammatory, insincere, digressive, extraneous, or off-topic messages in an online community, a newsgroup, forum, chat room, online video game, or blog, with the intent of provoking readers into displaying emotional responses, or manipulating others' perception."
I think this definition is pretty good. They come here trying to engage in posting which is not genuine. They want to create controversy. It is not clear what they hope to gain to me. Certainly someone who simply comes here to post disagreement in general with ASR reviews and measurements, who makes multiple accounts after being banned for good reason are not here for fruitful exchanges of ideas.