I think we are all trolls in one way or another, why do you post if not looking for a reply? A reply is a reaction, which is apparently what trolls look for. I normally post in the hope that I can teach or learn something, so I am seeking a reaction every time.
AFAIK trolling is deliberately misrepresenting your viewpoint in order to anger/annoy/win-up other forum users – especially if carried out using a purposely set-up second userid in order to obtain anonymity.
It’s not trolling to argue for what you believe, even if you take those arguments to extremes