The word 'trolling' seems to have taken on many definitions of late, you are probably using a different one than the article.
I understood the article to mean troll in the sense of a person purposefully misdirecting discussion to make people angry (note that the troll in this sense usually does not believe what they are saying, they're "trolling" for reactions).
It sounds like you are using the more recent use of "trolling" to mean "to disagree with someone".