Hmmm. Interesting topic. Defintion of trolling has changed and does change constantly due to personal agendas and how they are viewed.
Id suggest its repeatative posts. Nonsensical devoid of addressing subject matter posts. Posts for the sake of posts.
Boring attention seeking nothing posts which add zero to discussion except to illicit a response. Which is very very sad. When no words are of value anymore except to invoke a response . And nearly always poorly executed cos they have nothing to offer. To argue, discuss or explore.
But im most probably wrong. I defer to the trolling experts.