The behavior that you describe would certainly not make you a troll.
However, the poster in question, spends much of his time on the main board posting such things as "the Dolphins offense will never sniff the end zone" when they play the Bills or "guaranteeing a shutout".
This type of opinionated baiting, on the main board, is the definition of trolldom.
And, I am not the only poster here that has called him on it.
On the subject of Jim Kelly, anyone that would say anything about any kid is complete and utter scum. Further, many of us long time Miamians remained fans of Kelly due to his hailing from UM.