On being a troll... well.

This is muchly akin to a student handing in two scrappy pages of 'thoughts on the subject' instead of an assignment and along with it either a half hour verbal explanation or a four page letter discussing why the assignment was not done. Or someone who wanders off track in answering a question and then wishes to offer something else as a substitute - which often turns out to be either their own therapeutic writing or a virulent contribution to some moral crusade.